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. 07, 1998
Filed:
Aug. 23, 1995
Kazuo Yoshikawa, Saitama-ken, JP;
Fuji Photo Optical Co., Ltd., Saitama-ken, JP;
Abstract
A color separation prism having four blocks which can be directly placed at a position, where a color separation prism is to be provided, within a currently-used camera by making the F-number of the color separation prism substantially equivalent to that of an image pick-up lens, and which can implement a dual green system while obtaining the same brightness for the overall optical system as it is obtained from a color separation prism having three blocks. The color separation prism is made up of two prism blocks for separating an incident ray into a green color, one prism block for separating the incident ray into a red color, one prism block for separating the incident ray into a blue color, and an F-number which is substantially the same as an F-number of an image pick-up lens used together with the color separation prism.