Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-07-15
2009-12-29
Feild, Joseph H (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
Reexamination Certificate
active
07639586
ABSTRACT:
A disk-type hologram recording medium and a hologram recording and reproduction device utilizing such a recording medium are provided. The hologram recording and reproduction device includes a spatial optical modulator provided with a plurality of optical elements arranged in a grid-like form. These optical elements are divided into groups each associated with 1 bit of data for performing required light modulation. Thus, a special pattern exhibiting a greater S/N margin for 1 bit can be recorded in the recoding medium. During data recording or data reproduction, the special pattern is read from the recording medium, and based on the retrieved special pattern, fine adjustment by servo control is conducted for adjustment of tilting or focusing of the recording medium and for adjustment of the wavelength of the light emitted from the light source.
REFERENCES:
patent: 6995896 (2006-02-01), Yamabana et al.
patent: 7031038 (2006-04-01), Ogasawara et al.
patent: 7116626 (2006-10-01), Woods et al.
patent: 7206108 (2007-04-01), Tsukagoshi
patent: 7327602 (2008-02-01), Kostylev et al.
patent: 7545723 (2009-06-01), Tsukagoshi et al.
patent: 2002/0041561 (2002-04-01), Tsukamoto et al.
patent: 2002/0075776 (2002-06-01), Kasazumi et al.
patent: 11-016374 (1999-01-01), None
patent: 2002-216359 (2002-08-01), None
IEEE Standards 802.11F IEEETrial-Use Recommended Practice for Milti-Vendor Access Point. Interoperability bia an Inter-Access Point Protocol Acrodd Distribution Systems Supporting IEEE 802.11 Operation, IEEE Computer Society, The Institute of Electrical and Electronics Engineers, Inc., Jul. 14, 2003.
Tezuka Kouichi
Uno Kazushi
Yoshikawa Hiroyasu
Feild Joseph H
Fujitsu Limited
Fujitsu Patent Center
Haley Joseph
LandOfFree
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