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:
May. 11, 2010
Filed:
Aug. 20, 2008
Applicants:
Hiroyasu Yoshikawa, Kawasaki, JP;
Kouichi Tezuka, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Yasumasa Iwamura, Kawasaki, JP;
Yuzuru Yamakage, Kawasaki, JP;
Inventors:
Hiroyasu Yoshikawa, Kawasaki, JP;
Kouichi Tezuka, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Yasumasa Iwamura, Kawasaki, JP;
Yuzuru Yamakage, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03H 1/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A holographic recorder can vary the optical distance between an object lens and a relay lens near the object lens. This arrangement allows defocus-multiplexing utilizing state variations in the laser beam when the beam reaches a storage medium.