Optical: systems and elements – Holographic system or element – Hardware for producing a hologram
Reexamination Certificate
2005-05-31
2005-05-31
Chang, Audrey (Department: 2872)
Optical: systems and elements
Holographic system or element
Hardware for producing a hologram
C359S007000, C359S010000, C359S011000, C359S022000
Reexamination Certificate
active
06900914
ABSTRACT:
A description is provided of an optical information recording and reproducing apparatus having a volume holographic memory. The apparatus is capable of recording an interference pattern in the volume holographic memory in high density and can be made small-sized. The apparatus includes a comprises support portion for detachably supporting the volume holographic memory, which is made of a photorefractive crystalline material; a reference beam supplying portion for making a coherent reference beam of a first wavelength incident on the volume holographic memory; a signal beam generating portion for making a coherent signal beam of the first wavelength, which is modulated in accordance with image data, incident on the volume holographic memory, intersecting therein the signal beam with the reference beam, and generating a three-dimensional light interference pattern of the signal beam and the reference beam; and detecting a portion for detecting diffracted light from a refractive index grid of the light interference pattern in the volume holographic memory, due to irradiation of the reference beam. The signal beam and the reference beam are arranged in a plane having a normal line perpendicular to the symmetrical axis of rotation of the volume holographic memory.
REFERENCES:
patent: 3737878 (1973-06-01), Gamblin et al.
patent: 5483365 (1996-01-01), Pu et al.
patent: 5648856 (1997-07-01), Stoll
patent: 5665493 (1997-09-01), Bai et al.
patent: 5844700 (1998-12-01), Jeganathan et al.
patent: 6101161 (2000-08-01), Yang
patent: 6320683 (2001-11-01), Ito et al.
patent: 5-142979 (1973-06-01), None
patent: 10-97174 (1998-04-01), None
Hatano Hideki
Itoh Yoshihisa
Kouno Tomomitsu
Matsushita Hajime
Tanaka Satoru
Chang Audrey
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Pioneer Corporation
LandOfFree
Optical information recording and reproducing apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical information recording and reproducing apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical information recording and reproducing apparatus... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419503