Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Reexamination Certificate
2006-08-01
2006-08-01
Lavarias, Arnel C. (Department: 2872)
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
C359S030000, C359S035000, C369S103000
Reexamination Certificate
active
07085026
ABSTRACT:
The present invention makes it possible to reduce the size of an optical system for multiplex recording or reproduction of information utilizing holography.A pick-up of an optical information recording/reproducing apparatus generates information light by spatially modulating laser light emitted by a laser source device with a spatial light modulator depending on the information to be recorded and generates reference light for recording having a spatially modulated phase by spatially modulating the phase of laser beam emitted by the light source device with a phase-spatial light modulator. The information light and the reference light for recording are projected upon an optical information recording medium such that they converge in different positions, and information is recorded in the hologram layer in the form of an interference pattern as a result of interference between the information light reflected by a reflecting film and the reference light for recording. The positioning of the information light and the reference light for recording is carried out based on information recorded in address servo areas.
REFERENCES:
patent: 3573362 (1971-04-01), Burchardt
patent: 3899240 (1975-08-01), Gabor
patent: 4025731 (1977-05-01), Rembault
patent: 4104489 (1978-08-01), Satoh et al.
patent: 5111445 (1992-05-01), Psaltis et al.
patent: 5202979 (1993-04-01), Hillis et al.
patent: 5485312 (1996-01-01), Horner et al.
patent: 5566387 (1996-10-01), Dewald
patent: 5627664 (1997-05-01), Trisnadi
patent: 5719691 (1998-02-01), Curtis et al.
patent: 5740276 (1998-04-01), Tomko et al.
patent: 5917798 (1999-06-01), Horimai et al.
patent: 6272095 (2001-08-01), Liu et al.
patent: 52-100249 (1977-08-01), None
patent: A 62-16246 (1987-01-01), None
patent: A-62-24481 (1987-02-01), None
patent: A 2-163789 (1990-06-01), None
patent: A 4-228153 (1992-08-01), None
patent: A 5-6134 (1993-01-01), None
patent: 5-248348 (1993-10-01), None
patent: A 6-195793 (1994-07-01), None
patent: A 6-266275 (1994-09-01), None
patent: A 7-140886 (1995-06-01), None
patent: 8-315427 (1996-11-01), None
patent: 9-305978 (1997-11-01), None
patent: 10-124872 (1998-05-01), None
patent: 10-302293 (1998-11-01), None
patent: 2082994 (1997-06-01), None
P. Hariharan, ‘Optical Holography: Principles, techniques, and applications’, Cambridge University Press, Cambridge, 1996, pp. 69-84.
B.E.A. Saleh, M.C. Teich, ‘Fundamentals of Photonics’, John Wiley and Sons, New York, 1991, pp. 143-151.
J. F. Heanue et al., “Recall of linear combinations of stored data pages based on phase-code multiplexing in volume holography,” Optics Letters, vol. 19, No. 14, pp. 1079-1081, 1994.
J. F. Heanue et al., “Encrypted holographic data storage based on orthogonol-phase-code mulitplexing,” Applied Optics, vol. 34, No. 26, pp. 6012-6015, 1995.
Eiji Yagyu et al., “The New Realtime 3-D Imaging Technique by the Frequency Multiplexed PHB Hologram,” Technical Report of IEICE, EDI93-87, HC93-54, pp. 1-5, 1993.
“Fundamentals of Optical Memories,” published by Corona Corporation, pp. 104-133, 1990.
“O plus E,” No. 202, pp. 93-99, Sep. 1996.
Optics Letters, vol. 20, No. 7, Apr. 1, 1995, Optical Society of America, “Holographic storage using shift multiplexing”, Demetri Psaltis et al., pp. 770-772.
Lavarias Arnel C.
Oliff & Berridg,e PLC
Optware Corporation
LandOfFree
Apparatus and method for recording and reproducing optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for recording and reproducing optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for recording and reproducing optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3609866