Title:
APPARATUS AND METHOD FOR RECORDING OPTICAL INFORMATION, APPARATUS AND METHOD FOR REPRODUCING OPTICAL INFORMATION, AND APPARATUS AND METHOD FOR RECORDING/REPRODUCING OPTICAL INFORMATION
Document Type and Number:
WIPO Patent Application WO/2002/003145
Kind Code:
A1
Abstract:
Recording or reproduction of information by utilizing a holography, a small constitution of an optical system for the recording or reproduction, and improvement in the SN ratio of reproduction information. During information recording, information light and recording reference light with spatially modulated phases are generated by a phase spatial light modulator (44) from information to be recorded. An information recording layer (3) of an optical information recording medium (1) is irradiated with these lights to record information into the information recording layer (3) with inference patterns by the inference between the information light and the recording reference light. During information reproduction, the information recording layer (3) is irradiated with reproducing reference light, and reproduction light generated from the information recording layer (3) by the irradiation is superposed on the reproducing reference light to generate synthetic light, and this synthetic light is sensed by a photosensor (45) to reproduce the information.
Inventors:
HORIMAI HIDEYOSHI (JP)
Application Number:
PCT/JP2001/005389
Publication Date:
January 10, 2002
Filing Date:
June 25, 2001
Export Citation:
Assignee:
OPTWARE CORP (JP)
HORIMAI HIDEYOSHI (JP)
HORIMAI HIDEYOSHI (JP)
International Classes:
G03H1/04; G03H1/22; G03H1/26; G11B7/0065; G11B7/12; G03H1/10; G11B7/123; G11B7/125; G11B7/128; G11B7/1356; G11B7/135; (IPC1-7): G03H1/04; G11B7/0065; G11B7/135; G03H1/22
Foreign References:
| JPH06266274A | 1994-09-22 | |||
| JPH11311938A | 1999-11-09 | |||
| JPH10302293A | 1998-11-13 |
Other References:
JUN AMAKO AND TOMIO SHONEHARA: "Kinoform using an electrically controlled birefringent liquid-crystal spatial light modulator", APPLIED OPTICS, vol. 30, no. 32, 10 November 1991 (1991-11-10), pages 4622 - 4628, XP002947207
"O plus E", KABUSHIKI KAISHA SHINHGIJUTSU COMMUNICATIONS, no. 201, August 1996 (1996-08-01), pages 103 - 108, XP002947208
See also references of EP 1306732A4
"O plus E", KABUSHIKI KAISHA SHINHGIJUTSU COMMUNICATIONS, no. 201, August 1996 (1996-08-01), pages 103 - 108, XP002947208
See also references of EP 1306732A4
Attorney, Agent or Firm:
Hoshimiya, Katsumi (Toukou Building 15-7 Shinjuku 5-chome Shinjuku-ku, Tokyo, JP)
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