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:
Feb. 25, 1992
Filed:
Feb. 20, 1990
Applicant:
Inventors:
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359 93 ; 359 94 ; 359 53 ;
Abstract
An optical low-pass filter comprising a liquid crystal device or electrooptic device having a birefringent phenomenon and formed so as to be able to vary the birefringent amount of the incident light. This low-pass filter is favorably used to remove the Moire without so much reducing the resolving power in a television camera, electronic camera or fiberscope provided with a solid-state image sensor.