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. 12, 2017
Filed:
Dec. 12, 2012
Hitachi Consumer Electronics Co., Ltd., Yokohama, Kanagawa, JP;
Hirofumi Taguchi, Tokyo, JP;
Koji Fujita, Tokyo, JP;
Nobuo Nakai, Tokyo, JP;
Koichiro Nishimura, Tokyo, JP;
Taku Hoshizawa, Tokyo, JP;
Kazuyoshi Yamazaki, Tokyo, JP;
Hitachi Consumer Electronics Co., Ltd., Kanagawa, JP;
Abstract
An optical information recording and reproducing device that records information on a recording medium and/or reproduces information on the recording medium, using holography is configured to include a laser light source that performs irradiation with laser light, a first light-shielding portion which is capable of switching between transmission and shielding of laser light emitted from the laser light source, and a driving circuit that drives the switching between transmission and shielding of the first light-shielding portion, and a first movement portion that moves the first light-shielding portion.