Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2006-08-01
2006-08-01
Tran, Thang V. (Department: 2653)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C359S003000, C359S010000
Reexamination Certificate
active
07085217
ABSTRACT:
In a servo operation, position-controlling light, which is red light, is projected onto a recording medium so as to converge to a minimum diameter on a reflecting surface of the recording medium. In a recording operation, information light and recording-specific reference light, each of which is green light, are projected coaxially onto one side of an information recording layer of the recording medium so as to converge to a minimum diameter at an identical position located off the reflecting surface. Information is recorded in the information recording layer in the form of an interference pattern resulting from interference between the information light yet to impinge on the reflecting surface and the recording-specific reference light reflected by the reflecting surface and an interference pattern resulting from interference between the recording-specific reference light yet to impinge on the reflecting surface and the information light reflected by the reflecting surface.
REFERENCES:
patent: 5917798 (1999-06-01), Horimai et al.
patent: 6995882 (2006-02-01), Horimai
patent: 1065658 (2001-01-01), None
J. Ashley, et al; “Holographic data storage” IBM J.Res. Develop; vol. 44 No. 3 3, May 2000; pp. 341-368.
Horimai Hideyoshi
Kinoshita Masaharu
Kumagai Kenichiro
Lim Pang Boey
Cowan Liebowitz & Latman P.C.
Montague Mark
Optware Corporation
Tran Thang V.
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