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:
Oct. 29, 2002
Filed:
Jun. 21, 2000
Applicant:
Inventors:
Myeongkyu Lee, Tsukuba, JP;
Kenji Kitamura, Tsukuba, JP;
Yasunori Furukawa, Tsukuba, JP;
Shunji Takekawa, Tsukuba, JP;
Yoshihisa Ito, Tsurugashima, JP;
Hideki Hatano, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H 1/03 ;
U.S. Cl.
CPC ...
G03H 1/03 ;
Abstract
A two-color holographic recording apparatus reduces error signals possibly included in reproduced digital data signals. The two-color holographic recording apparatus has first, second and third light shutters for passing or blocking gate light, signal light and reference light incident on a recording medium respectively, and a controller for controlling the respective states of the first, second and third light shutters.