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:
Sep. 14, 2010
Filed:
Dec. 21, 2004
Takuya Tsukagoshi, Kanagawa, JP;
Jiro Yoshinari, Tokyo, JP;
Hideaki Miura, Tokyo, JP;
Tetsuro Mizushima, Moriguchi, JP;
Takuya Tsukagoshi, Kanagawa, JP;
Jiro Yoshinari, Tokyo, JP;
Hideaki Miura, Tokyo, JP;
Tetsuro Mizushima, Moriguchi, JP;
TDK Corporation, Tokyo, JP;
Abstract
A holographic recording apparatusrealizes multilevel gray-scale recording by: controlling a reflection type spatial light modulator (DMDD) via a control unitso that an object beam in an object optical systemis reflected in an exposure direction so as to be incident on a holographic recording mediumor in a non-exposure direction so as not to be incident thereon selectively pixel by pixel in accordance with a data page to be recorded; and making (N+1) levels of gradation exposure with a single exposure time tgiven by dividing tby N, where tis an exposure time necessary for rendering a single pixel of the data page as an ON pixel, and N is an integer of not less than 2.