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. 10, 2012
Filed:
Feb. 27, 2007
Applicants:
Taku Amada, Kanagawa, JP;
Tomohiro Nakajima, Tokyo, JP;
Akihisa Itabashi, Tokyo, JP;
Seizo Suzuki, Chiba, JP;
Inventors:
Taku Amada, Kanagawa, JP;
Tomohiro Nakajima, Tokyo, JP;
Akihisa Itabashi, Tokyo, JP;
Seizo Suzuki, Chiba, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/47 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical scanning apparatus, an image formation apparatus, and a phase modulation method are disclosed. The optical scanning apparatus includes a liquid crystal device for deflecting an optical beam irradiated by a semiconductor laser. The driving voltages for the liquid crystal device are controlled based on, e.g., the temperature of the liquid crystal device so that degradation of the diameter of a spot of the optical beam due to wavefront aberration is prevented.