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:
Jul. 20, 2010
Filed:
Dec. 07, 2008
Kazushi Uno, Kawasaki, JP;
Kouichi Tezuka, Kawasaki, JP;
Hiroyasu Yoshikawa, Kawasaki, JP;
Yasumasa Iwamura, Kawasaki, JP;
Yuzuru Yamakage, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Kouichi Tezuka, Kawasaki, JP;
Hiroyasu Yoshikawa, Kawasaki, JP;
Yasumasa Iwamura, Kawasaki, JP;
Yuzuru Yamakage, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A hologram recording device for irradiating a recording beam (S) to a hologram recording medium (B) at a fixed incident angle (θs) and irradiating a reference beam (R) to an illuminated region (p) of the recording beam (S) by variably controlling an incident angle (θr) of the reference beam (R) on the hologram recording medium (B), whereby a hologram is recorded on the illuminated region (p) in multiple, includes at least a variable reflector () directing the reference beam (R) to the illuminated region by reflection and being swung around a predetermined axis (x) for changing the incident angle (θr) of the reference beam (R); and a light shield () being swung integrally with the variable reflector () for partially shielding the reference beam (R) so that a luminous flux diameter thereof becomes narrower as the incident angle (θr) becomes larger.