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:
Apr. 17, 2007
Filed:
May. 19, 2003
Kazuo Kuroda, Tsurugashima, JP;
Satoshi Sugiura, Tsurugashima, JP;
Shuuichi Yanagisawa, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Yoshihisa Itoh, Tsurugashima, JP;
Akihiro Tachibana, Tsurugashima, JP;
Yoshihisa Kubota, Tsurugashima, JP;
Kazuo Kuroda, Tsurugashima, JP;
Satoshi Sugiura, Tsurugashima, JP;
Shuuichi Yanagisawa, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Yoshihisa Itoh, Tsurugashima, JP;
Akihiro Tachibana, Tsurugashima, JP;
Yoshihisa Kubota, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A hologram record apparatus () includes a spatial light modulator () and a control device (). The spatial light modulator () is arranged on an optical path of signal light (L) and divided into a plurality of cell blocks () arranged in a matrix. Each of the cell blocks () is further divided into a plurality of cells () arranged in a matrix. The spatial light modulator () can perform modulation on the cell basis. The control device () controls the spatial light modulator so as to modulate the signal light according to a plurality of record information sets to be recorded on a hologram record medium (). Pluralities of modulation units () existing in the same cell block are not made into identical patterns. Since a plurality of cell blocks having a large pitch as compared to the pixel pitch are simultaneously or successively turned on/off, it is possible to reduce the distance between the zeroth-order light and the higher-order light.