Hologram information recording medium and hologram...

Details Hologram information recording medium and hologram... Hologram information recording medium and hologram...

2011-03-15

2011-03-15

Tran, Thang V (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

07907494

ABSTRACT:
To provide a hologram information recording medium and a hologram information recording/reproducing device capable of accurately reproducing data multiplexed on the recording medium irrespective of the influence of the external environment and so forth.In one recording area31of a recording medium3, a plurality of the same information groups are recorded in substantially the same area with varied multi-parameters, in consideration of the expansion and the contraction of the recording medium3. That is, a plurality of data groups A to D are recorded in the one recording area31of the recording medium3, with a laser wavelength λ varied. Specifically, the data groups A to D are recorded in one recording area as three groups: a data group G1including data A1, data B1, data C1, and data D1; a data group G2including data A2, data B2, data C2, and data D2; and a data group G3including data A3, data B3, data C3, and data D3.

REFERENCES:
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patent: 2002/0075776 (2002-06-01), Kasazumi et al.
patent: 2007/0127100 (2007-06-01), Wilson et al.
patent: 2007/0258343 (2007-11-01), Jung et al.
patent: 62-217283 (1987-09-01), None
European Search Report dated Jun. 20, 2008 from European Application No. 06713790.1.

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