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.:

US 7755819 B1

PDF
Full Text
Expired
Date of Patent:
Jul. 13, 2010

Filed:

Mar. 14, 2008
Applicants:

Kazushi Uno, Kawasaki, JP;

Kouichi Tezuka, Kawasaki, JP;

Hiroyasu Yoshikawa, Kawasaki, JP;

Yasumasa Iwamura, Kawasaki, JP;

Yuzuru Yamakage, Kawasaki, JP;

Inventors:

Kazushi Uno, Kawasaki, JP;

Kouichi Tezuka, Kawasaki, JP;

Hiroyasu Yoshikawa, Kawasaki, JP;

Yasumasa Iwamura, Kawasaki, JP;

Yuzuru Yamakage, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract

A hologram recorder (A) includes: a light source () for emitting a coherent beam; a spatial light modulator () provided with unit areas having a plurality of beam reflection elements () to reflect the beam from the light source () in a main direction as a signal beam or a cut-off direction; and a signal beam optical system () for directing the signal beam to the hologram recording medium (B). The recorder (A) further includes: a wavefront reshaper () for condensing the beams thinned out in the cut-off direction by the beam reflection element () of the modulator (), and reshaping the wavefront of the condensed beams; and a reference beam optical system () for directing the beam from the reshaper () to the recording medium (B) as a reference beam to be shone in an overlapping manner with the signal beam.


Find Patent Forward Citations

Uno, Kazushi. (2010). Hologram recording device (U.S. Patent No. 7755819). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7755819

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