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Browse by Category: Main > Information Technology
Class Information
Number: 369/121
Name: Dynamic information storage or retrieval > Specific detail of information handling portion of system > Radiation beam modification of or by storage medium > With particular light source (e.g., laser, crt with phosphor)
Description: Subject matter including either structural detail of a light source, or a light source characterized by a function or relationship additional to conventional light emission.










Sub-classes under this class:

Class Number Class Name Patents
369/123 Glow lamps 5
369/122 Solid state 229


Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
5933402 Optical pickup capable of compatibly adopting disks of different thickness Aug. 3, 1999
5909425 Optical information reproduction apparatus having a semiconductor laser device light source Jun. 1, 1999
5905699 Focusing apparatus and optical disk apparatus using the same May. 18, 1999
5905750 Semiconductor laser package and method of fabrication May. 18, 1999
5900619 Optical device comprising a photodetector for detecting light scattered outside a diffraction limit of an objective lens May. 4, 1999
5898662 Semiconductor light emitting device, its manufacturing method and optical recording and/or reproducing apparatus Apr. 27, 1999
5894467 Multiple VSEL assembly for read/write and tracking applications in optical disks Apr. 13, 1999
5889751 Method for optically controlling an optical device and an optical control device utilizing the method Mar. 30, 1999
5880766 Apparatus for correcting positional deviation of light source emitting light beams in image recording apparatus Mar. 9, 1999
5874730 Optical pickup employing a vertical cavity surface-emitting laser diode Feb. 23, 1999
5872764 Light emitter-receiver device and optical reading system Feb. 16, 1999
5867469 Optical pickup device with biaxial drive for objective lens Feb. 2, 1999
5856965 Optical disc readout apparatus for different types of optical discs Jan. 5, 1999
5831960 Integrated vertical cavity surface emitting laser pair for high density data storage and method of fabrication Nov. 3, 1998
5831959 Laser control circuit in recordable optical disk drive Nov. 3, 1998
5825743 Illuminating multiple data tracks of an optical disk with a laser source of reduced coherence Oct. 20, 1998
5808986 Multiple beam optical memory system with solid-state lasers Sep. 15, 1998
5793731 Apparatus and method for fabricating a deflection mirror tower Aug. 11, 1998
5777970 Optical disk readout apparatus Jul. 7, 1998
5776574 Optical recording medium and optical recording/reproducing apparatus Jul. 7, 1998
5759419 Method of manufacturing a magnetic recording medium and a semiconductor laser texturing apparatus Jun. 2, 1998
5757741 CD ROM head with VCSEL or VCSEL array May. 26, 1998
5748578 Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same May. 5, 1998
5717676 Apparatus for recording on master optical disc Feb. 10, 1998
5712844 Optical pickup Jan. 27, 1998
5709978 Supperresolution readout thin film and information recording medium Jan. 20, 1998
5705246 Master disc for an optical disc and method for manufacturing the master disc Jan. 6, 1998
5706270 Compact optical pick-up lead with a vertically inclined substrate integrated with laser source and light detector Jan. 6, 1998
5703860 Optical imaging recording system for performing image recording by focusing modulated light beams Dec. 30, 1997
5703863 Optical device which detects reflected light with a push-pull method without dividing the reflected light Dec. 30, 1997
5689495 High density optical disc and optical disc player Nov. 18, 1997
5684778 Initialization process for a phase change recording medium with a zero level drop in flash light emission Nov. 4, 1997
5680384 Laser emission unit, optical head and optical memory device Oct. 21, 1997
5680381 Recording medium, recording method, recording/reproducing apparatus, and cutting apparatus Oct. 21, 1997
5663944 Vertical cavity laser light beam monitored by reflection of a half mirror, with application in optical pick-up Sep. 2, 1997
5659534 Apparatus for reproducing optical information contained disks of various recording densities Aug. 19, 1997
5657308 Apparatus for recording/reproducing information data in two dimensional format Aug. 12, 1997
5650874 Optical beamsplitter Jul. 22, 1997
5633747 Variable spot-size scanning apparatus May. 27, 1997
5625617 Near-field optical apparatus with a laser having a non-uniform emission face Apr. 29, 1997
5625616 Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method Apr. 29, 1997
5622816 Direct to stamper/mother optical disk mastering Apr. 22, 1997
5619488 Information recording device Apr. 8, 1997
5615198 Optical head and image recording apparatus including the same Mar. 25, 1997
5615200 Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head Mar. 25, 1997
5610896 Optical recording system using a gas laser capable of oscillating in a single longitudinal mode Mar. 11, 1997
5606541 Switchable filter for modulating laser intensity and reducing laser feedback in an optical disk device Feb. 25, 1997
5606542 Optical pickup using three beam tracking method Feb. 25, 1997
5604046 Magneto-optical recording medium and a method using the same Feb. 18, 1997
5602819 Optical information system to detect reflection of pit depth by evanescent wave Feb. 11, 1997

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