http://www.freshpatents.com/Dynamic-information-storage-or-retrieval-dtnewntc369.php USPTO Class 369 - Dynamic information storage or retrieval en-us Tue, 18 Aug 2009 22:23:22 -0700 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Optical-disc-apparatus-and-method-for-discriminating-optical-disc-dt20090813ptan20090201775.php Tue, 18 Aug 2009 22:23:22 -0700 This invention improves the accuracy of wobble signal detection for disc discrimination and reduces discrimination errors due to noise. In an optical disc apparatus, a wobble signal generator creates a wobble signal from an electrical signal which has been obtained from conversion by a pickup. A bandpass filter (BPF) is... http://www.freshpatents.com/Optical-information-recording-device-and-recording-correction-calculation-method-dt20090813ptan20090201776.php Tue, 18 Aug 2009 22:23:22 -0700 When recording recording information by forming on a recording medium a recording mark whose mark length is an integral multiple of the reference mark length according to a recording signal generated from a recording information signal, this method performs a process of: generating, after recording compensation recording information on the... http://www.freshpatents.com/Optical-pickup-apparatus-reproducing-apparatus-recording-apparatus-and-tracking-error-signal-generation-method-dt20090813ptan20090201777.php Tue, 18 Aug 2009 22:23:22 -0700 An optical pickup apparatus, a reproducing apparatus, a recording apparatus, and a tracking error signal generation method are provided. Four light-receiving elements receive stray light of main and sub beams reflected from, out of a plurality of recording layers of the optical disk, the one other than that for effecting... http://www.freshpatents.com/Novel-reading-inhibit-agents-dt20090813ptan20090201779.php Tue, 18 Aug 2009 22:23:22 -0700 Disclosed is an optical disk, card or media which comprises: a) a plurality of data structures that are readable by the interrogating beam of light; and b) a composition on or in the optical disk, card or media disposed so that when the optical disk, card or media is used... http://www.freshpatents.com/Optical-disk-playback-device-dt20090813ptan20090201778.php Tue, 18 Aug 2009 22:23:22 -0700 An optical disk playback device includes a control means (an LSI 5 for system control) for performing a track search according to contents information, comparing a current track start point position at the time after performing the track search with a target track start point position, when the comparison result... http://www.freshpatents.com/Optical-disc-optical-disc-recording-apparatus-and-optical-disc-recording-method-dt20090813ptan20090201780.php Tue, 18 Aug 2009 22:23:22 -0700 Drive information is updated to always include the recording/playback conditions determined from the most recent learning process on a data recording medium. The data recording medium has a data recording area for recording data, and a drive information area for recording drive information. The drive information includes a plurality of... http://www.freshpatents.com/Method-and-product-for-copy-protection-of-optical-discs-using-unbalanced-dc-content-dt20090813ptan20090201781.php Tue, 18 Aug 2009 22:23:22 -0700 The present invention relates to a method of copy protecting optical discs, such as CDs or DVDs. Instead of encoding data onto the CD-ROMs in a conventional manner which ensures balanced dc content, for copy protection the digital data is encoded and recorded onto the optical disc such that it... http://www.freshpatents.com/Apparatus-and-method-to-set-a-rotation-rate-for-an-optical-and-holographic-data-storage-medium-dt20090813ptan20090201783.php Tue, 18 Aug 2009 22:23:22 -0700 A method to set a rotation rate for an optical holographic data storage medium by determining if the optical storage layer comprises an alternating series of lands and grooves. If the optical storage layer does not comprise an alternating series of lands and grooves, the method rotates the optical holographic... http://www.freshpatents.com/Apparatus-and-method-to-store-and-retrieve-information-using-an-optical-holographic-data-storage-medium-dt20090813ptan20090201784.php Tue, 18 Aug 2009 22:23:22 -0700 A method using an optical holographic data storage medium and an optical holographic data storage drive, comprising removeably disposing the optical holographic data storage medium in the optical holographic data storage drive, and determining whether to write information to the holographic data storage layer, and/or whether to read information from... http://www.freshpatents.com/Holographic-disk-with-optical-notch-filter-label-dt20090813ptan20090201782.php Tue, 18 Aug 2009 22:23:22 -0700 A holographic disk, including: a holographic recording layer and a servo-tracking layer, the holographic recording layer separated from the servo-tracking layer by a dichroic mirror that prevents a data I/O laser from accessing the servo-tracking layer while allowing a servo-tracking laser to access embedded servo tracks; a transparent cover layer... http://www.freshpatents.com/Optical-element-and-objective-optical-system-dt20090813ptan20090201786.php Tue, 18 Aug 2009 22:23:22 -0700 −60<P2/P4<0  (6). P2×P4<−100  (5); and P2<0  (4); where P2, P4, P6 . . . denote coefficients of 2nd order, 4th order, 6th order . . . , respectively, h denotes a height from an optical axis of the optical element,... http://www.freshpatents.com/Optical-pickup-and-optical-disc-drive-dt20090813ptan20090201785.php Tue, 18 Aug 2009 22:23:22 -0700 An optical pickup has a semiconductor laser device that can emit laser beams with different wavelengths. A beam splitter and objective lens direct the emitted beam onto a rotating optical disc. Reflected light returns through the objective lens and beam splitter to a photodetector. A pair of liquid crystal elements... http://www.freshpatents.com/Pickup-device-dt20090813ptan20090201787.php Tue, 18 Aug 2009 22:23:22 -0700 A pickup device includes an irradiation optical system including an object lens for focusing light flux on a track of a recording surface of an optical recording media having a plurality of recording layers stacked while a spacer layer is interposed between the recording layers to form a spot and... http://www.freshpatents.com/Acousto-optic-reading-recording-head-for-high-density-optical-disks-dt20090813ptan20090201788.php Tue, 18 Aug 2009 22:23:22 -0700 High-density optical data storage comprising multi-layer optical disc and multi-wavelength reading/recording head, wherein the reading/recording head utilizes a single-mode optic fiber connecting the head with remote short-wavelength laser and acousto-optical (AO) cells that allow precisely positioning the focused light spot on the track and filtering the specific wavelength from multi-wavelength... http://www.freshpatents.com/Optical-head-device-for-forming-light-spot-on-disc-shaped-information-medium-dt20090813ptan20090201789.php Tue, 18 Aug 2009 22:23:22 -0700 An optical head device has at least one upward-reflecting mirror, objective lenses, an objective lens actuator, and a moving mechanism. The upward-reflecting mirror receives an incident luminous flux having a wavelength emitted from a semiconductor, and changes its direction. The objective lenses having mutually different numerical apertures condenses the luminous... http://www.freshpatents.com/Operating-current-modifying-device-and-method-dt20090813ptan20090201790.php Tue, 18 Aug 2009 22:23:22 -0700 An operating current modifying device is provided for a power generating element. The power generating element generates an output power when the operating current is larger than a threshold current in the power generating element. A functional relationship is between the threshold current and the temperature of the electrical device.... http://www.freshpatents.com/Optical-pickup-apparatus-dt20090813ptan20090201791.php Tue, 18 Aug 2009 22:23:22 -0700 An optical-pickup apparatus comprising: a polarization beam splitter fixed to a base, which includes a first prism that laser light emitted from a laser diode enters, a second prism that return light of the laser light reflected from a signal recording layer of an optical disc enters, and a control... http://www.freshpatents.com/Optical-disc-recording-device-recording-method-optical-disc-and-optical-disc-playback-device-dt20090813ptan20090201792.php Tue, 18 Aug 2009 22:23:22 -0700 An optical disc recording device includes a recording unit configured to apply optical beams, on an optical disc on which a main-data sequence is recorded in advance by forming recording marks and spaces having lengths corresponding to the main-data sequence on a track center line on an information recording surface... http://www.freshpatents.com/Master-substrate-and-method-of-manufacturing-a-high-density-relief-structure-dt20090813ptan20090201793.php Tue, 18 Aug 2009 22:23:22 -0700 The present invention relates to a recording stack for obtaining a high-density relief structure, comprising: a first recording layer (10) on top of a second recording layer (12), the recording layers being supported by a substrate layer (14), wherein, upon projecting light on the recording layers, a local interaction of...