The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2011
Filed:
Feb. 15, 2006
Naoyuki Tokuchi, Miyagi-ken, JP;
Yoshihiro Someno, Miyagi-ken, JP;
Naoyuki Tokuchi, Miyagi-ken, JP;
Yoshihiro Someno, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
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 areaof a recording medium, 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 medium. That is, a plurality of data groups A to D are recorded in the one recording areaof the recording medium, 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 Gincluding data A, data B, data C, and data D; a data group Gincluding data A, data B, data C, and data D; and a data group Gincluding data A, data B, data C, and data D.