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<title>freepatentsonline.com: Dynamic information storage or retrieval</title>
<link>http://www.freepatentsonline.com/result.html?query_txt=ccl/369%20and%20isd/04/24/2008&amp;usapp=on</link>
<description>USPTO Class 369 Dynamic information storage or retrieval</description>
<language>en-us</language>
<lastBuildDate>Wed Apr 30 17:03:09 EDT 2008</lastBuildDate>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094995.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical disc device]]></title>
<link>http://www.freepatentsonline.com/20080094992.html</link>
<description><![CDATA[An optical disc device includes: a spindle motor for rotating a disc; a motor driving circuit for applying a voltage to the spindle motor to drive the spindle motor; an optical pickup for irradiating the disc with an optical beam; and a detector for, after the motor driving circuit starts voltage application to the spindle motor, measuring a pit length based on reflection light, on the disc, of the optical beam irradiated by the optical pickup and then detecting based on a result of the measurement that the spindle motor is in short condition. In the optical disc device, upon detection by the detector that the spindle motor is in short condition, the motor driving circuit stops the voltage application to the spindle motor.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method of controlling th ewriting power of a laser beam and optical recorder]]></title>
<link>http://www.freepatentsonline.com/20080094944.html</link>
<description><![CDATA[A method of controlling the writing power of a laser beam in an optical recorder and an optical recorder having means for controlling the writing power of the laser beam are provided. The invention is directed to a Walking Optimum Power Control (Walking OPC) during writing onto an optical storage medium having two storage layers. The method comprises the steps of: incrementing a first counter ( 20 ) when a writing power control is performed with respect to a writing operation onto the first storage layer ( 16 ); incrementing a second counter ( 22 ) when a writing power control is performed with respect to a writing operation onto the second storage layer ( 18 ); calculating a first waiting time between two writing power control operations with respect to the first storage layer ( 16 ) under consideration of the first counter ( 20 ); and calculating a second waiting time between two writing power control operations with respect to the second storage layer ( 18 ) under consideration of the second counter ( 22 ).]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISK HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080095034.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[INFORMATION RECORDING MEDIUM, APPARATUS FOR RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, METHOD OF RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, AND COMPUTER-READABLE RECORDING MEDIUM STORING PROGRAM FOR EXECUTING THE METHOD]]></title>
<link>http://www.freepatentsonline.com/20080094988.html</link>
<description><![CDATA[An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[RECORDING METHOD AND OPTICAL DISK APPARATUS USING THE METHOD]]></title>
<link>http://www.freepatentsonline.com/20080094991.html</link>
<description><![CDATA[In order to meet the requirement for enhancing the speed of an optical disk apparatus, it is necessary to have a write strategy for compensating thermal interference during recording at high speed on a high-density optical disk such as BD. However, there has been no known technology for such a write strategy. By shifting the start position and the end position of a recording pulse in accordance with the preceding mark length, the preceding space length, the recording mark length, and the following space length, excellent jitter values have been obtained. Further, by simplifying parameters when the preceding pattern contains the shortest mark and the shortest space which cause large thermal interference, 12× BD recording can be achieved with the number of parameters smaller than double the number of parameters of the conventional 4×4 type write strategy.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094997.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[HOLOGRAPHIC REPRODUCING APPARATUS]]></title>
<link>http://www.freepatentsonline.com/20080094999.html</link>
<description><![CDATA[A holographic reproducing apparatus capable of regulating aberration to a low level and suitable for reducing the size of the entire optical system is provided.   When a forward meniscus lens is used for a converting lens  12  that collimates a reference beam L 2 , the converting lens  12  can be disposed between a light source  11  and the principal point Q of the converting lens  12  since the principal point Q of the lens is located at a position adjacent to a light-emitting surface  12 a . With this, the distance between the light source  11  and a reflecting mirror  13  can be reduced, and thereby a reduction in the size of the optical system of a holographic reproducing apparatus  10  can be achieved.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Device for Recording Data, Comprising a Peripheral Support Membrane, and Method for Producing Same]]></title>
<link>http://www.freepatentsonline.com/20080095021.html</link>
<description><![CDATA[The data recording device comprises a two-dimensional array of microdots of nanometric dimensions arranged facing a storage medium. The storage medium comprises a sensitive area preferably comprising a flexible membrane and extended at its periphery by a flexible fixing membrane. The sensitive area of the storage medium is thus flexibly fixed to an external frame, allowing movement of the sensitive area in its plane and perpendicularly to its plane. The microdots are preferably formed on a convex front face of a substrate, enabling contact between each of the microdots and the sensitive area to be ensured in all cases. The radius of curvature of the convex surface is preferably comprised between 0.5 m and 5 m.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[COMBINED FLUORESCENT-REFLECTIVE MEDIA AND MEDIA READING DEVICE]]></title>
<link>http://www.freepatentsonline.com/20080094990.html</link>
<description><![CDATA[The invention relates to optical media of ROM, WORM, or RW type that combine the ability to write and read data from one layer using fluorescent and reflective methods. Data is recorded as pits of different depth situated either in two alternating spiral tracks or in the same track. Data is read either sequentially, e.g., first by a fluorescent signal, then by a reflective signal, or simultaneously by using two optical heads, one that is fluorescent and the other that is optical]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISK HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080095033.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[SYSTEM FOR GENERATING REFERENCE BEAM ANGLE CONTROL SIGNAL AND HOLOGRAPHIC INFORMATION RECORDING AND/OR REPRODUCING APPARATUS EMPLOYING THE SYSTEM]]></title>
<link>http://www.freepatentsonline.com/20080094998.html</link>
<description><![CDATA[A system for generating a reference beam angle control signal and a holographic information recording and/or reproducing apparatus including the system are provided. When record of a two-dimensionally (2D) modulated signal beam superposed in the same volume of a holographic medium is called a book, the system includes: a first photo-detector and a second photo-detector arranged to detect signal beams reproduced from first and second adjacent books disposed on both sides of a specific book that is to be reproduced from the holographic medium; and a signal processing unit arranged to obtain a reference beam angle control signal for controlling the incident angle of a reference beam emitted to the holographic medium using a differential signal between output signals of the first and second photo-detectors.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[INFORMATION RECORDING MEDIUM, APPARATUS FOR RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, METHOD OF RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, AND COMPUTER-READABLE RECORDING MEDIUM STORING PROGRAM FOR EXECUTING THE METHOD]]></title>
<link>http://www.freepatentsonline.com/20080094989.html</link>
<description><![CDATA[An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080094996.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080094993.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[INFORMATION RECORDING MEDIUM, APPARATUS FOR RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, METHOD OF RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, AND COMPUTER-READABLE RECORDING MEDIUM STORING PROGRAM FOR EXECUTING THE METHOD]]></title>
<link>http://www.freepatentsonline.com/20080094994.html</link>
<description><![CDATA[An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095005.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095003.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095000.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094966.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095008.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL PICKUP AND OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE]]></title>
<link>http://www.freepatentsonline.com/20080095014.html</link>
<description><![CDATA[An optical pickup equipped with a laser light source which emits light beams of at least three wavelengths for recording/reproducing a plurality of information recording media detects light quantities of the light beams of three wavelengths using one light intensity monitor element. More specifically, one light intensity monitor element is arranged between a first laser light source and a second laser light source, light beams of wavelength λ 1  and wavelength λ 2  emitted from the first laser light source are made to proceed substantially straightforward, the optical path of the light beam of wavelength λ 3  emitted from the second laser light source is changed to a diagonal one so as to cause the light beam to be introduced diagonally to the light receiving surface of the one light intensity monitor element. Furthermore, the central axis line of the light receiving surface of the one light intensity monitor element is separated from the emitted light axis of the first laser light source and a reflecting member is provided above the emitting light axis of the second laser light source.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095011.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING AND/OR REPRODUCING DATA WITH RESPECT TO MULTI-LAYER INFORMATION STORAGE MEDIUM HAVING OPTIMAL POWER CONTROL AREAS]]></title>
<link>http://www.freepatentsonline.com/20080094973.html</link>
<description><![CDATA[An information storage medium having a plurality of information storage layers, each of which includes an optimal power control (OPC) area for obtaining an optimal recording condition, wherein OPC areas in odd-numbered and even-numbered information storage layers are disposed not to face each other and not to contact each other, or partially overlap each other and lock out use of the overlapped portion. Therefore, when an OPC area of one information storage layer performs OPC, this OPC does not affect another information storage layer.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094956.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095001.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[High-density optical disc, method for recording and reproducing encrypted data thereon]]></title>
<link>http://www.freepatentsonline.com/20080095026.html</link>
<description><![CDATA[A high-density optical disc, a method for encrypting data and recording the encrypted data thereon, and a method for reproducing the encrypted data recorded thereon. Data recorded on a high-density optical disc such as a Blu-ray disc-read only memory (BD-ROM) is recorded in a discontinuous recording format as on a high-density rewritable optical disc such as a Blu-ray disc rewritable (BD-RE). Data can be encrypted and recorded using synchronous data, address unit number (AUN) information or disc radius information recorded in the high-density optical disc. An optical disc apparatus such as a BD-ROM player can maintain reproduction compatibility with the high-density rewritable optical disc such as the BD-RE. A user holding an optical disc apparatus such as a BD-RE recorder, etc. can be prevented from unlawfully copying data recorded on the high-density optical disc and reproducing the copied data.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL PICKUP APPARATUS AND OPTICAL DISC APPARATUS USING SAME]]></title>
<link>http://www.freepatentsonline.com/20080094948.html</link>
<description><![CDATA[An optical pickup apparatus is provided with a dividing element having a plurality of regions. The dividing element is capable of dividing a light flux reflected by the optical disc into a plurality of light fluxes having different outgoing directions. Each region of the dividing element and light receiving parts of a light detector are structured such that when a target information recording layer of the optical disc is brought into focus, a light flux reflected from the target information recording layer is focused on the light receiving parts of the light detector, and a light flux reflected from other information recording layer than the target information recording layer is not irradiated onto the light receiving parts of the light detector.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094967.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical recording medium, recording/reproducing apparatus and method, initialization method, and reinitialization method]]></title>
<link>http://www.freepatentsonline.com/20080094969.html</link>
<description><![CDATA[A recording/reproducing apparatus includes a writing/reading unit writing data to or reading data from an information recording medium having an access control area in which access control data is recorded, the access control data having common information set to allow the recording/reproducing apparatus that cannot recognize a predetermined function adapted to the information recording medium to control access to the information recording medium; and a control unit controlling the writing/reading unit to record access control data regarding a function recognizable by the recording/reproducing apparatus in the access control area when the information recording medium is initialized or reinitialized.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094962.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISK HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094985.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Checking a Batch of Dvd Titles to be Archived]]></title>
<link>http://www.freepatentsonline.com/20080094945.html</link>
<description><![CDATA[Administrating content of a digital video disc (DVD) having, on-disc, a database involves storing, externally to the DVD, information of the database. Based on the stored information, a check is made as to whether the DVD is operable to accommodate a proposed change to the content. The change on the DVD is made and the on-disc database is correspondingly updated, if the check determines that the DVD is so operable, e.g., if remaining resources of the DVD suffice to make the change. Preferably, the making of the change and the updating on-disc are interactively subject to the user's acceptance by means of a user interface.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup apparatus and optical disc apparatus using same]]></title>
<link>http://www.freepatentsonline.com/20080094976.html</link>
<description><![CDATA[A method of detecting a servo signal of an optical disc having a plurality of recording layers includes focusing and irradiating a laser light onto the optical disc, dividing a laser light reflected from the optical disc into a plurality of reflected laser lights by a division element, wherein each of said reflected laser lights having a different outgoing direction, and irradiating the reflected laser lights onto a plurality of light receiving parts of a light detector. A focus error signal is detected under a knife edge method and a tracking error signal is detected.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094959.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup apparatus and optical disc apparatus using same]]></title>
<link>http://www.freepatentsonline.com/20080094949.html</link>
<description><![CDATA[An optical pickup apparatus includes a semiconductor laser for emitting a laser light, an objective lens for irradiating the light flux emitted from the semiconductor laser onto an optical disc, and a light detector for receiving the light flux reflected from the optical disc. The light detector has a light receiving part that comprises a region  1 , a region  2 , a region  3 , a region  4 , a region  5 , a region  6  and a region  7.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095006.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095009.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup and optical disc drive]]></title>
<link>http://www.freepatentsonline.com/20080095017.html</link>
<description><![CDATA[The present invention provides a thin optical disc drive for three different media BD, DVD, and CD for notebook personal computers and an optical pickup to be mounted thereon.  An optical pickup includes a first laser light source which emits an optical beam with a first wavelength; a second laser light source which emits an optical beam with a second wavelength shorter than the first wavelength; a first collimate lens which converts the optical beam emitted from the first laser light source into an approximately-parallel optical beam; a second collimate lens which converts the optical beam emitted from the second laser light source into an approximately-parallel optical beam; a first objective lens which converges the approximately-parallel optical beam converted by the first collimate lens, onto an optical disc; and a second objective lens which converges the approximately-parallel optical beam converted by the second collimate lens, onto an optical disc; wherein the first and second objective lenses are arranged in the optical disc radial direction; the second objective lens is arranged closer to the side of the optical disc outer circumference than the first objective lens; the first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens; the second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens; and the gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094964.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method and Device for Focus Management When Recording on Optical Storage Media]]></title>
<link>http://www.freepatentsonline.com/20080094972.html</link>
<description><![CDATA[The present invention relates to a method and a parameter-determining unit ( 100 ) for determining a first focus offset parameter value. The method of determining this parameter value for writing content data to a multilayer storage medium ( 114 ) comprises the steps of writing test data sequences using different estimated first focus offset parameter values (step  206 ), reading the test data sequences (step  206 ), determining values of at least one data deviation measure of the read test data sequences (step  206 ), and determining the first focus offset parameter value in dependence upon the determined values of at least one data deviation measure (steps  210,222 ), such that the block error rate of the read-out of content data, written to the multilayer storage medium ( 114 ) while using the determined first focus offset parameter value and read from the multilayer portable storage medium ( 114 ) while using the determined second focus offset parameter value, is minimized.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical Disk Drawing Apparatus, Optical Disk Drawing System And Optical Disk Drawing Method]]></title>
<link>http://www.freepatentsonline.com/20080094955.html</link>
<description><![CDATA[In the optical disk drawing apparatus of the present invention, an automatic adjusting area where the drawing operation is not carried out is provided in the optical disk, laser light is irradiated onto the formed automatic adjusting area so as to control the focus servo gain, so that a stable focus servo control can be carried out.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD AND APPARATUS FOR RECORDING DATA ON OPTICAL DISC]]></title>
<link>http://www.freepatentsonline.com/20080095025.html</link>
<description><![CDATA[An apparatus and method for recording data on an optical disc, are discussed. In an embodiment of the present invention, when recording of real-time input data in a high quality mode is requested, an Optimum Power Control (OPC) operation for recording is performed while input data is encoded in a quality mode, which is downwardly adjusted, for example, to a standard quality mode, and is then buffered in a buffer memory. After the OPC operation has been completed, the buffered data is recorded on the optical disc while the data is encoded in the requested high quality mode and is then buffered. Further, the input data is encoded in the requested high quality mode, but may be buffered in a hard disc, rather than the buffer memory, during the performance of the OPC operation.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Recording medium having data structure for managing reproduction of data streams recorded thereon and recording and reproducing methods and apparatuses]]></title>
<link>http://www.freepatentsonline.com/20080095028.html</link>
<description><![CDATA[The data structure includes a navigation area of a computer readable medium storing navigation data associated with a data stream representing a portion of at least one reproduction path. The navigation data includes indication information, and the indication information indicates whether the data stream represents multiple reproduction paths or the data stream represents a single reproduction path. If the indication information indicates the data stream represents multiple reproduction paths, the navigation data includes path number information and an indicator associated with each reproduction path. The path number information identifies a number of the multiple reproduction paths, and each indicator indicates a file associated with the associated one of the multiple reproduction paths.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095031.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Layer jump on a multi-layer disc]]></title>
<link>http://www.freepatentsonline.com/20080094952.html</link>
<description><![CDATA[A method and an apparatus for writing on a multi-layer disc are described. The occurrence of a layer jump, due to the fact that e.g. the storage space available on a first layer is exhausted, is anticipated by monitoring the storage space available remaining. When approaching the layer jump a calibration procedure for recording on a second layer is launched, so that when the layer jump is actually taking place, recording can be resumed on the second layer with minimum delay.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method and system for fluid mediated disk activation and deactivation]]></title>
<link>http://www.freepatentsonline.com/20080094970.html</link>
<description><![CDATA[Embodiments of methods and systems for controlling access to information stored on memory or data storage devices are disclosed. In various embodiments, fluid-mediated modification of information or access to information is utilized. According to various embodiments, data storage devices designed for rotating access are described which include rotation-activated fluid control mechanisms.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095012.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094978.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094984.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method Of Optimizing The Write Power For Recording Marks In An Information Layer Of A Record Carrier And Recording Device Using Such An Optimizing Method]]></title>
<link>http://www.freepatentsonline.com/20080094958.html</link>
<description><![CDATA[The present invention relates to a method of optimizing the write power for recording marks in an information layer of a record carrier by irradiating the information layer with a (pulsed) radiation beam, said information layer having a phase that is reversibly changeable between a first (for example a crystal) phase and a second (for example an amorphous) phase. Since the methods known for 1 T write strategies generally cannot be used for nT write strategies, n being an integer greater than 1, a new method is proposed comprising the steps of: recording (S 1) a pattern of test marks including short marks having a predetermined short nominal runlength onto the record carrier by applying at least three different write powers, measuring (S2) the runlengths of said recorded short marks obtained by applying the at least three different write powers, and determining (S4) an optimum write power on the basis of the deviations of the measured runlengths from the nominal runlength of said short marks.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094961.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Recording medium having data structure for managing reproduction of data streams recorded thereon and recording and reproducing methods and apparatuses]]></title>
<link>http://www.freepatentsonline.com/20080095027.html</link>
<description><![CDATA[The data structure includes a navigation area of a computer readable medium storing navigation data associated with a data stream representing a portion of at least one reproduction path. The navigation data includes indication information, and the indication information indicates whether the data stream represents multiple reproduction paths or the data stream represents a single reproduction path. If the indication information indicates the data stream represents multiple reproduction paths, the navigation data includes path number information and an indicator associated with each reproduction path. The path number information identifies a number of the multiple reproduction paths, and each indicator indicates a file associated with the associated one of the multiple reproduction paths.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095002.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD FOR CALIBRATING A TRACKING ERROR SIGNAL OF AN OPTICAL DISK DRIVE]]></title>
<link>http://www.freepatentsonline.com/20080094975.html</link>
<description><![CDATA[The invention provides a method for adjusting a tracking error signal of an optical disk drive. First, a pickup head control signal is applied to an actuator to move a pickup head. The tracking error signal is then generated while the pickup head moves. The tracking error signal is then sampled and a characteristic value of the tracking error signal is determined. An adjustment signal is then generated according to the characteristic value and a target value. Finally, the tracking error signal is adjusted according to the adjustment signal.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094963.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical Device For Recording and Reproducing]]></title>
<link>http://www.freepatentsonline.com/20080095016.html</link>
<description><![CDATA[The invention relates to an optical device comprising a first radiation source ( 101 ) for producing a first radiation beam, a second radiation source ( 101 ) for producing a second radiation beam and means for directing the first and second radiation beams along a common optical path. Each radiation beam has an intensity distribution, a central axis and an outer envelope. The optical device further comprises, in the common optical path, means ( 103 ) for modifying the intensity distribution of the first radiation beam only. This means are designed for increasing the ratio between the intensity near the envelope and the intensity near the central axis of the first radiation beam by reducing at least the intensity of the first radiation beam near its central axis.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical Information Recording/Reproducing Device]]></title>
<link>http://www.freepatentsonline.com/20080094980.html</link>
<description><![CDATA[An optical information read/write apparatus according to the present invention includes: a light source  1  that emits a laser beam to access an information storage medium optically; a laser driver  51 a  for supplying drive current to a semiconductor laser as the light source  1 ; an RF superimposed current generator  51 c  for adding RF superimposed current to the drive current; a temperature sensor  35  for detecting a temperature around the light source  1 ; and a control section for switching the values of the RF superimposed current according to the temperature detected.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical Disc Device for Recording and Reproducing]]></title>
<link>http://www.freepatentsonline.com/20080094947.html</link>
<description><![CDATA[An optical scanning device for scanning an information carrier comprising tracks with a track pitch q, the closest track to the center of the information carrier having a radius r. The optical scanning device comprises a radiation source for generating a radiation beam and means for generating three spots on the information carrier from said radiation beam. The means for generating three spots are arranged in such a way that the distance s between two consecutive spots on he information carrier is such that equation (I) where s and q are in micrometers and r in millimeters, r is inferior to 10 millimeters and α is superior to 0.2.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094968.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL PICKUP APPARATUS, METHOD OF PRODUCING THE SAME, AND OPTICAL INFORMATION RECORDER-REPRODUCER INCLUDING THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094950.html</link>
<description><![CDATA[In an optical pickup apparatus of the present invention, an integrated optical unit including at least a light emitting element, a light receiving element, and an optical element is installed on a housing. The housing includes arrangement sections on which the respective elements of those at least the light emitting element, the light receiving element, and the optical element are to be rigidly mounted so that the respective elements are integral with the housing via the arrangement sections. In other words, the integrated optical unit is installed on the housing by use of a discrete method so that positional adjustment of respective optical components is simplified. The optical components are adjusted highly precisely in a simplified manner so that optical pickup apparatuses that are small, light, and high-quality are provided.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Device and Method for Providing Media-Related Parameters on a Medium and for Retrieving Such Parameters]]></title>
<link>http://www.freepatentsonline.com/20080094971.html</link>
<description><![CDATA[The present invention relates to a record carrier, to a drive device for the record carrier, and to a method of providing at least one parameter that defines at least one characteristic of the record carrier on said record carrier. The at least one parameter is determined during a first access operation to the record carrier and is then written to a predetermined area of the record carrier by using a predetermined pattern of at least two different power levels. During a subsequent second access operation the at least one parameter is retrieved from the record carrier by detecting jitter values in the read-out signal. Thereby, a simple and reliable measure for storing and retrieving these parameters on the record carrier is provided.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISK APPARATUS]]></title>
<link>http://www.freepatentsonline.com/20080094954.html</link>
<description><![CDATA[In an optical disk apparatus according to an exemplary embodiment of the invention, a management information retaining unit retains an information group which should regularly be recorded as disk management information. The disk management information is obtained from a disk loaded in the optical disk apparatus, and the obtained disk management information and the information group retained by the management information retaining unit are compared with each other to detect an error in the disk management information obtained from the disk. The detected error of the disk management information is corrected into regular information, and recording and reproducing operations are performed to the disk based on the corrected disk management information.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Information Recording Medium]]></title>
<link>http://www.freepatentsonline.com/20080095024.html</link>
<description><![CDATA[An information recording medium comprising a plurality of recording layers (L0 layer, L1 layer) for recording a plurality of pieces of recording information, respectively, wherein the first recording layer (L0 layer) located on the closest side when viewed from the side being irradiated with a laser beam has an identification information recording area (NBCA) previously recorded with information (e.g. media ID) for identifying the information recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094957.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD AND APPARATUS FOR MANAGING DEFECTS IN RECORDING MEDIA, A COMPUTER READABLE MEDIUM INCLUDING COMPUTER READABLE CODE FOR THE SAME, AND A DEFECT MANAGED RECORDING MEDIUM OBTAINED USING THE SAME METHOD, APPARATUS, AND COMPUTER READABLE MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094977.html</link>
<description><![CDATA[A method, apparatus and computer readable medium for managing recording medium defects and a defect managed recording medium. The recording medium includes a spare area in which a replacement area, which is a substitute for a defective area of the recording medium, is formed, and a temporary defect management area in which temporary management information that specifies the defective area and the corresponding replacement area is recorded, wherein position information and state information regarding the defective area are recorded in the replacement area. Accordingly, it is possible to restore defect information even if recording medium defect management on the recording medium ended abnormally.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094960.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095004.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094983.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095030.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL PICKUP APPARATUS AND OPTICAL DISC APPARATUS USING THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080094943.html</link>
<description><![CDATA[An optical pickup apparatus is equipped with a light emitting device, a first objective lens for focusing a laser beam emitted from the light emitting device onto a first optical disc, a second objective lens for focusing the laser beam emitted from the light emitting device onto a second optical disc, a light receiving device for receiving the laser beam reflected by the first or second optical disc, and an optical system for dividing the laser beam emitted from the light emitting device into a beam for the first objective lens and a beam for the second objective lens. The optical pickup apparatus is capable of performing at least either recording or reproduction on/from two kinds of information recording/reproduction media that are different from each other in thickness of substrate using a laser beam emitted from the identical light emitting device, and is small in size.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method and Apparatus for Scanning Data Stored on an Optical Storage Medium]]></title>
<link>http://www.freepatentsonline.com/20080094946.html</link>
<description><![CDATA[A method and an apparatus for scanning data stored along a track (16) on an optical storage medium (10) are provided. A light beam (12) is projected on the optical storage medium, thereby creating a scanning spot (14) that essentially follows the track (10). The relative position of the scanning spot (14) and the track (16) are varied in a radial direction. The variation of this positions occurs at a frequency v of v =β. S.4- NA/λ, wherein NA is the numerical aperture of the light beam (12), X is the C wavelength of the light, S is the scanning speed, and β≧0.01. The scanning spot is generated by a wavelength change is translated into a displacement of the beam by a pair of gratings.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical Disc Device]]></title>
<link>http://www.freepatentsonline.com/20080095018.html</link>
<description><![CDATA[An optical disc device comprising: first and second laser diodes to radiate first and second laser beams with different first and second wavelengths, respectively; a first objective lens to irradiate the first laser beam to reflection area to read out image recording control data for controlling record of image recorded in the reflection area on label side of optical disc; a second objective lens to irradiate the second laser beam to image recording area to record image in the image recording area on the label side after reading out the data; a lens holder that the lenses are fixed thereon to be arranged side by side in radial direction, to be displaced in direction toward signal side and the radial direction; and a control unit to obtain distance between the lenses in the radial direction to calibrate recording position of image signal recorded in the image recording area.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC SYSTEM AND RELATED DETECTING METHODS FOR ANALYSIS OF MICROSCOPIC STRUCTURES]]></title>
<link>http://www.freepatentsonline.com/20080094974.html</link>
<description><![CDATA[An optical disc system includes a photo detector circuit of an optical disc drive and a signal processing system. The photo detector circuit is configured to generate at least one information-carrying signal from an optical disc assembly. The signal processing system is coupled to the photo detector circuit to obtain from the at least one information-carrying signal both operational information used to operate the optical disc system and data indicative of presence and/or characteristics of an investigational feature associated with the optical disc assembly. Methods and discs for imaging a biological or medical investigational feature are also provided.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095007.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[METHOD OF RECORDING TEMPORARY DEFECT LIST ON WRITE-ONCE RECORDING MEDIUM, METHOD OF REPRODUCING THE TEMPORARY DEFECT LIST, RECORDING AND/OR REPRODUCING APPARATUS, AND THE WRITE-ONCE RECORDING MEDIUM]]></title>
<link>http://www.freepatentsonline.com/20080094965.html</link>
<description><![CDATA[A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095010.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup apparatus and optical disc apparatus using same]]></title>
<link>http://www.freepatentsonline.com/20080094951.html</link>
<description><![CDATA[An optical pickup apparatus includes a semiconductor laser for emitting a laser light, an objective lens for irradiating the light flux emitted from the semiconductor laser onto an optical disc, and a light detector for receiving the light flux reflected from the optical disc. The light detector has a light receiving part that comprises five regions of a region  1 , a region  2 , a region  3 , a region  4  and a region  5.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[INFORMATION RECORDING MEDIUM, APPARATUS FOR RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, METHOD OF RECORDING AND/OR REPRODUCING DATA ON AND/OR FROM INFORMATION RECORDING MEDIUM, AND COMPUTER-READABLE RECORDING MEDIUM STORING PROGRAM FOR EXECUTING THE METHOD]]></title>
<link>http://www.freepatentsonline.com/20080094979.html</link>
<description><![CDATA[An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[FOCUS PULL-IN METHOD AND OPTICAL DISC DRIVE THEREOF]]></title>
<link>http://www.freepatentsonline.com/20080094953.html</link>
<description><![CDATA[A focus pull-in method to perform an accurate focus pull-in operation in an optical disc drive using a holographic optical element (HOE) in consideration of a pseudo s-curve and an optical disc drive capable of performing the focus pull-in method, the method comprising checking whether a pseudo s-curve is contained in a focus error signal that is generated when an object lens of the optical disc drive is moved upwards or downwards, and, if the pseudo s-curve is contained in the focus error signal, controlling a focus pull-in operation for a disc loaded into the optical disc drive according to detection conditions for the pseudo s-curve. Accordingly, it is possible to accurately focus the data layer even during the driving of the disc that uses a wavelength that results in a low diffractive efficiency of the HOE.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Tracking Error Signal Calibration Method, and Disc Drive Implementing Such Method]]></title>
<link>http://www.freepatentsonline.com/20080094982.html</link>
<description><![CDATA[A method for generating a calibration value (TESC) for a tracking error signal (TES) in an optical disc drive ( 1 ) comprises the steps of performing a jump towards a target track of an optical disc ( 2 ) inserted in said optical disc drive ( 1 ); during at least a part of the jump, calculating the calibration value (TESC) as an approximation of the average of a plurality of tracking error signal amplitudes (TESA(i)) corresponding to a plurality of track crossings.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095029.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095032.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING UNIFORM STRUCTURE]]></title>
<link>http://www.freepatentsonline.com/20080095013.html</link>
<description><![CDATA[An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL RECORDING MEDIUM AND DISC CARTRIDGE]]></title>
<link>http://www.freepatentsonline.com/20080098416.html</link>
<description><![CDATA[An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change of the light beam carried by a return light from the signal recording layer is detected to read the information signal recorded on the signal recording layer. The optical recording medium has a diameter of 65 mm or less and a thickness of 0.4 to 0.7 mm. An information signal recording area extends outwardly from a radial position of 12.5 mm or less from the center of the medium. The ratio in area between the information signal recording area and non-signal recording area is 3.4 or more. The storage capacity of this medium is 2 gigabytes or more. The optical recording medium has formed at the center thereof a center hole around which an annular table-abutment convexing to one side of the medium is formed. A magnetic-clamping hub is installed in the center hole and thus the medium is magnetically clamped to a rotation driving mechanism of an optical recording and/or reproducing apparatus. The compactness and high density of recording of the optical recording medium will contribute greatly to a further compact structure of a recording and/or reproducing apparatus in which the medium is to be used.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[OPTICAL DISC HAVING TRACKING POLARITY INFORMATION, AND APPARATUSES AND METHODS FOR RECORDING AND REPRODUCING USER DATA ON THE SAME]]></title>
<link>http://www.freepatentsonline.com/20080095023.html</link>
<description><![CDATA[An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Method Of Converting A User Bitstream Into Coded Bitstream, Method For Detecting A Synchronization Pattern In A Signal, A Record Carried, A Signal, A Recording Device And A Playback Device All Using A Freely Insertable Synchronization Pattern]]></title>
<link>http://www.freepatentsonline.com/20080094986.html</link>
<description><![CDATA[This invention proposes synchronization patterns for RLL codes with a constraint. Instead of including the synchronization pattern in the pattern the pattern is chosen to have p leading bits and q trailing bits such that all channel code constraints are met by the last code word of the section preceding the synchronization pattern together with the p leading bits and by a first code word of the section following the synchronization pattern together with the q trailing bits of the synchronization pattern. This results in a freely insertable synchronization pattern that can be inserted after coding and removed before decoding resulting in an more efficient coder and decoder.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Object lens unit and optical pickup device employing the unit]]></title>
<link>http://www.freepatentsonline.com/20080094737.html</link>
<description><![CDATA[An object lens unit for an optical pickup device is disclosed. The object lens unit includes a first optical element facing an optical information recording medium; a second optical element positioned on a light source side of the first optical element; and a frame in which the first optical element and the second optical element are fixed. The frame includes a first fitting portion and a second fitting portion, and has a prescribed clearance in a perpendicular direction to the optical axis between at least one of the first fitting portion of the frame and the first optical element, and the second fitting portion of the frame and the second optical element to adjust a position of at least one of the first optical element and the second optical element in a perpendicular direction to the optical axis. An optical pickup device including such object lens unit is also disclosed.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Media Processor]]></title>
<link>http://www.freepatentsonline.com/20080094987.html</link>
<description><![CDATA[A media storage is adapted to store a plate-shaped medium. A media drive is operable to write data in the medium. A label printer is operable to print on the medium. A media conveyer is operable to convey the medium between the media storage, the media drive and the label printer. A casing defines an interior space of the media processor. A plate-shaped frame divides the interior space into a first space located in a rear upper portion of the interior space, a second space located in a rear lower portion of the interior space and a front space located in a front portion of the interior space. The media drive is disposed in the first space. The label printer is disposed in the second space. The media storage and the media conveyer are disposed in the front space.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Diffractive Part]]></title>
<link>http://www.freepatentsonline.com/20080095015.html</link>
<description><![CDATA[A diffractive part for an optical scanning device is described. The device is for scanning a first information layer by means of a first radiation beam having a first wavelength and a first polarisation, a second information layer by means of a second radiation beam having a second wavelength and a second polarisation, and a third information layer by means of a third radiation beam having a third wavelength and a third polarisation. The first, second and third wavelengths differ from each other. The device includes a radiation source for supplying the first, second and third radiation beams, an objective lens system for converging the radiation beams on the respective information layer, and a diffractive part arranged in the optical path of the radiation beams. The diffractive part includes a first diffractive grating structure having a series of steps of predetermined height to introduce a phase change that is an integral multiple of 27E for both the second and third wavelengths but not the first wavelength, and a second diffractive grating structure having a series of steps of predetermined height to introduce a phase change that is an integral multiple of 27π for the first and third wavelengths but not the second wavelength.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Semiconductor Integrated Circuit, Semiconductor Device, And Optical Disc Recording Device]]></title>
<link>http://www.freepatentsonline.com/20080094981.html</link>
<description><![CDATA[The semiconductor integrated circuit includes a sample-and-hold circuit including a capacitor connected to its output portion, a low-pass filter as another signal processing circuit, an analog switch which selects and outputs the output of the sample-and-hold circuit or the output of the low-pass filter, a buffer circuit to which the output of the analog switch is input, and an amplifier which is provided subsequent to the buffer circuit and has at least a first resistor and a second resistor.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[AUTOMATIC BALANCING APPARATUS, ROTATING APPARATUS, DISC DRIVE APPARATUS, BALANCER, AND HOUSING]]></title>
<link>http://www.freepatentsonline.com/20080095022.html</link>
<description><![CDATA[An automatic balancing apparatus is disclosed. The automatic balancing apparatus includes a housing, magnetic fluid, and a plurality of balancers. The housing is rotatable. The magnetic fluid is contained in the housing. Each of the plurality of balancers is movable in the housing and has a magnet and a yoke which is mounted thereto and which has a raised portion or a depressed portion formed on an inner circumferential side of a rotation of the housing.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup and manufacturing method for optical pickup]]></title>
<link>http://www.freepatentsonline.com/20080095019.html</link>
<description><![CDATA[An optical pickup includes a first objective lens, a second objective lens having a numerical aperture different from that of the first objective lens, and an objective lens holder that holds the objective lenses. The first objective lens is attached to the objective lens holder via a spacer. The objective lens holder has a first fixture hole that receives the spacer with the first objective lens and a second fixture hole that receives the second objective lens. The first fixture hole is provided with a spacer supporting portion in which the spacer is inserted in a rotatable manner.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

<item>
<title><![CDATA[Optical pickup]]></title>
<link>http://www.freepatentsonline.com/20080095020.html</link>
<description><![CDATA[The optical pickup includes two objective lenses, and an objective lens holder that holds the two objective lenses. The objective lens holder has two fixture holes that pass through from the lower surface to the upper surface to which the two objective lenses are attached at an upper portion with space between them. The fixture hole is provided with a fixed lens supporting portion and two movable lens supporting portions for supporting the objective lens and adjusting tilt degree thereof. The movable lens supporting portion includes a through hole that passes through to the upper portion of the fixture hole and a column member that is inserted in the through hole in a slidable manner.]]></description>
<pubDate>April 24, 2008</pubDate>
</item>

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