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Class Information
Number: 369/109.02
Name: Dynamic information storage or retrieval > Specific detail of information handling portion of system > Radiation beam modification of or by storage medium > Diffractive storage medium information element > Plural elements with distinct diffractive characteristics
Description: Subject matter wherein the radiant energy beam is diffracted by a multiplicity of elements each having a different diffractive attribute, or the radiant energy beam causes the modification of the storage medium to store plurality of elements each having a different diffractive attribute.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7593306 |
Diffraction element and optical pick-up apparatus having the same |
Sep. 22, 2009 |
| 7502299 |
Objective optical system and optical pickup device using it |
Mar. 10, 2009 |
| 7502301 |
Diffraction grating for plural wavelengths, optical pickup apparatus and optical disk apparatus using diffraction grating for plural wavelengths |
Mar. 10, 2009 |
| 7345987 |
Optical disc which stores digital information in informational units which diffract a line of laser light at one of 1024 angles and a corresponding light detecting apparatus for reproducing in |
Mar. 18, 2008 |
| 6898169 |
Optical pickup head device, information recording/reproducing apparatus, and method for recording information |
May. 24, 2005 |
| 6891675 |
Optical device |
May. 10, 2005 |
| 6683832 |
Optical recording/reproducing apparatus for writing and/or reading data to and/or from optical recording medium having data recorded in pit trains of mutually different depths |
Jan. 27, 2004 |
| 6600711 |
Optical recording medium including prepit sequence formed at predetermined interval between land track and neighboring groove track along spiral |
Jul. 29, 2003 |
| 6556537 |
Optical recording medium having two pit trains of mutually different depths, and master for manufacturing the optical recording medium |
Apr. 29, 2003 |
| 6529463 |
Very-high-density memory device utilizing a scintillating data-storage medium |
Mar. 4, 2003 |
| 6512732 |
Device for optically scanning information tracks on a plane using two subbeams |
Jan. 28, 2003 |
| 6418107 |
Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same |
Jul. 9, 2002 |
| 6400671 |
Optical head device |
Jun. 4, 2002 |
| 6091693 |
Optical recording medium and optical information storage unit |
Jul. 18, 2000 |
| 5875170 |
Optical data carriers and reading devices therefor |
Feb. 23, 1999 |
| 5838651 |
Optical read-out head capable of improved read-out of media with different pit heights |
Nov. 17, 1998 |
| 5761175 |
Apparatus and method for reproducing information recored on an optical recording medium on which pits with 2.sup.N depths are formed |
Jun. 2, 1998 |
| 5659536 |
Optical storage method and device for storing and reading digital information |
Aug. 19, 1997 |
| 5644565 |
Optical recording medium including a plurality of diffracted grating cells |
Jul. 1, 1997 |
| 5625619 |
Optical recording medium having a plurality of different diffraction grating cells |
Apr. 29, 1997 |
| 5602819 |
Optical information system to detect reflection of pit depth by evanescent wave |
Feb. 11, 1997 |
| 5577016 |
Recording medium having concavo-convex pits with a maximum and a minimum pit depth depending on the wavelength of a laser light |
Nov. 19, 1996 |
| 5572508 |
Optical disc having square information pits arranged in symmetrical patterns |
Nov. 5, 1996 |
| 5570338 |
Optical information recording medium which uses diffraction grating |
Oct. 29, 1996 |
| 5553051 |
Increased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the same |
Sep. 3, 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 |
| 5530641 |
Optical recording medium having grooves and lands and/or plural pit lines, and reproducing apparatus therefor |
Jun. 25, 1996 |
| 5500849 |
Construction of optical disk |
Mar. 19, 1996 |
| 5493552 |
Phase change optical information recording system with a header area in the form of prepit rows |
Feb. 20, 1996 |
| 5485441 |
Method of optically reading information, optical pickup apparatus and optical reproducing apparatus |
Jan. 16, 1996 |
| 5477524 |
Optical memory medium with preformed pit arrangement |
Dec. 19, 1995 |
| 5471455 |
High density optical storage system |
Nov. 28, 1995 |
| 5463609 |
Information recording and reproducing device and a method using the same |
Oct. 31, 1995 |
| 5444689 |
Detection of phase and amplitude modulation information on optical medium with a waveguide |
Aug. 22, 1995 |
| 5436883 |
Recording medium and information recording and reproducing apparatus therefor |
Jul. 25, 1995 |
| 5339304 |
Optical disc having two-step pit structure and pickup apparatus |
Aug. 16, 1994 |
| 5331623 |
Optical retrieval system for encoding pit angular data and optical recording element therefor |
Jul. 19, 1994 |
| 5291471 |
Recording/reproducing system using phase encoding of optical storage medium |
Mar. 1, 1994 |
| 5285274 |
Optical waveguide recording medium and apparatus for playing the same |
Feb. 8, 1994 |
| 5278816 |
Recording/reproducing system using wavelength/depth selective optical storage medium |
Jan. 11, 1994 |
| 5235587 |
Optical data storage apparatus and method |
Aug. 10, 1993 |
| 5220556 |
Optical disk with identification phase-encoded area |
Jun. 15, 1993 |
| 5200941 |
Optical retrieval system for encoding pit angular data and optical recording element thereof |
Apr. 6, 1993 |
| 5179547 |
Phase change optical information recording medium including means for preventing movement of the recorded portion |
Jan. 12, 1993 |
| 5168490 |
Record carrier with optically readable phase structure having tracks with different phase depths and apparatus for reading such a record carrier |
Dec. 1, 1992 |
| 5166989 |
Integrated polarization detection system |
Nov. 24, 1992 |
| 5117412 |
Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc |
May. 26, 1992 |
| 5084860 |
Apparatus for optical disc memory with correction pattern and master disc cutting apparatus |
Jan. 28, 1992 |
| 5060223 |
Optical type information recording medium having specified pit and guide groove shapes |
Oct. 22, 1991 |
| 4970712 |
Method for recording data onto optical data recording cards using pits for indicating the center line positions of data arrays provided on said cards |
Nov. 13, 1990 |
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