US 7,321,541 B2
Information recording method, reproducing method, and recording/reproducing method utilizing holography
Hideyoshi Horimai, Yokohama (Japan)
Assigned to Optware Corporation, Kanagawa (Japan)
Appl. No. 10/530,942
PCT Filed Oct. 09, 2003, PCT No. PCT/JP03/12955
§ 371(c)(1), (2), (4) Date Apr. 08, 2005,
PCT Pub. No. WO2004/034387, PCT Pub. Date Apr. 22, 2004.
Claims priority of provisional application 60/417484, filed on Oct. 09, 2002.
Prior Publication US 2006/0050544 A1, Mar. 09, 2006
Int. Cl. G11B 7/00 (2006.01)
U.S. Cl. 369—103 14 Claims
OG exemplary drawing
 
1. An information recording method wherein information is recorded to a recording medium by utilizing an interference pattern formed by the interference between an information light, which is spatially modulated by digital pattern information displayed in a spatial light modulator which has a large number of pixels, and reference light for recording, wherein:
digital information that is recorded is digital pattern information and expressed by the matching or mismatching of the attributes of adjacent pixels in said spatial light modulator wherein:
if the attributes of the adjacent pixels match each other, one of the digital information “0” and “1” is expressed; and
if the attributes of the adjacent pixels do not match each other, another one of the digital information “0” and “1” is expressed.