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:
Dec. 27, 1983
Filed:
Feb. 02, 1981
Applicant:
Inventors:
Assignee:
Fuji Photo Optical Co., Ltd., Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04N / ;
U.S. Cl.
CPC ...
350173 ; 350174 ; 358 55 ;
Abstract
A color separation optical system consisting of prism blocks is provided with a bias light source and a bias light guide-in device. The bias light guide-in device consists of a plane parallel plate located with an air gap in front of an entrance face of the color separation optical system. The plane parallel plate has light reflecting surfaces to reflect the bias light toward the entrance face. The light reflecting surfaces are provided at the periphery of the plane parallel plate and are desirably made into light diffusing faces.