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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
5587985 Signal processing device for an optical information reproducing apparatus Dec. 24, 1996
5586097 Optical head for generating a plurality of light beams and an opto-magnetic recording/reproducing/erasing apparatus using same Dec. 17, 1996
5585200 Over write capable magnetooptical recording medium Dec. 17, 1996
5581523 Laser emission unit, optical head and optical memory device Dec. 3, 1996
5566142 Apparatus using an optical pickup Oct. 15, 1996
5557601 Optical information recording/reproducing method and apparatus in which a first optical spot performs focusing, tracking, erasing and recording and a second optical spot performs two reproduci Sep. 17, 1996
5548576 Optical recording medium and data reproducing apparatus for reproducing data from such optical recording medium Aug. 20, 1996
5539722 Optical information reproducing system with a reading beam having frequency components of N wavelengths corresponding to four times the N depths to a row of pits Jul. 23, 1996
5537617 Multi-channel optical head and data storage system Jul. 16, 1996
5535189 Optical information system with a broad non-coherent irradiating beam coupled with optical fiber from a laser source Jul. 9, 1996
5530689 Optical pickup Jun. 25, 1996
5515355 Light modulator and optical head adjustment method May. 7, 1996
5513164 Optical recording and reproducing apparatus Apr. 30, 1996
5495461 Optical pickup head apparatus Feb. 27, 1996
5495464 Optical data recording/reproducing apparatus Feb. 27, 1996
5491678 Method and apparatus for recording/reproducing information data in a two-dimensional format Feb. 13, 1996
5490128 Optical head having a light source adjusting mechanism and a method for adjusting a light source in an optical head Feb. 6, 1996
5485441 Method of optically reading information, optical pickup apparatus and optical reproducing apparatus Jan. 16, 1996
5477557 Laser drive circuit with independently adjustable maximum and minimum power levels Dec. 19, 1995
5474826 Optical recording medium and optical recording/reproducing apparatus Dec. 12, 1995
5475518 Apparatus for optically transmitting data Dec. 12, 1995
5463610 Two-beam optical head for forming first and second light spots on a recording medium Oct. 31, 1995
5461602 Optical recording and reproducing method and apparatus using light beams of two different wavelenghts Oct. 24, 1995
5452283 Lens/mirror tower for an optical storage device Sep. 19, 1995
5450390 Method and apparatus for writing and reading information and storage medium used for the same Sep. 12, 1995
5448548 Optical information reading method for reducing laser noise using a semiconductor laser and a driving device for the semiconductor laser Sep. 5, 1995
5448540 Device for detecting the position of a recording/reproducing element Sep. 5, 1995
5442597 Apparatus for writing and reading a magneto-optical record carrier Aug. 15, 1995
5434841 Plural-beam optical head Jul. 18, 1995
5418765 Apparatus for recording and reproducing optical information having an optical waveguide May. 23, 1995
5412635 Optical disk with signal pit recording format, method of recording same and optical pickup May. 2, 1995
5406543 Optical head with semiconductor laser Apr. 11, 1995
5400314 Optical pickup using a lamp Mar. 21, 1995
5396481 Semiconductor laser device which emits inclined laser beam Mar. 7, 1995
5383175 Laser power control with defocusing offset during data recording Jan. 17, 1995
5375111 Optical information recording medium, and audio and video information recording method Dec. 20, 1994
5365535 Semiconductor laser and beam splitting devices, and optical information recording/reproducing, optical communication, and optomagnetic recording/reproducing apparatuses using semiconductor las Nov. 15, 1994
5363365 Optical pickup apparatus including a moveable pickup driver using a multiplexer for reducing the number of signal lines Nov. 8, 1994
5355360 Semiconductor laser controlling apparatus Oct. 11, 1994
5353273 Multi-channel optical head and data storage system Oct. 4, 1994
5339201 Optical computing element Aug. 16, 1994
5335213 Positional detection of a magneto-optic recording medium for controlling irradiation of a relief region Aug. 2, 1994
5329512 Temperature detection of a magneto-optic recording medium for controlling irradiation of an erasure region Jul. 12, 1994
5327415 Integrated light deflector and method of fabrication therefor Jul. 5, 1994
5325348 Wavelength converting element and system for recording and reproducing optical information Jun. 28, 1994
5323374 Method of magneto-optical recording Jun. 21, 1994
5313449 Optical recording medium and method of optically playing back same including recording medium structure operating as optical resonators emitting applied pumping light at a variable frequency May. 17, 1994
5313448 Laser device driven by a periodic waveform optimized for reducing laser noise May. 17, 1994
5311495 Optical system for converging light beams to form a single beam spot on an optical disc May. 10, 1994
5307337 Optical disk drive having a low-emission high-bandwidth laser driver Apr. 26, 1994

1 2 3 4 5 6 7 8 9 10










 
 
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