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. 29, 1987
Filed:
Dec. 31, 1986
Applicant:
Inventors:
Kaoru Onodera, Hino, JP;
Satoru Hohnishi, Hino, JP;
Kazuyuki Kobayashi, Hino, JP;
Kazuo Shiozawa, Hino, JP;
Assignee:
Konishiroku Photo Ind. Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350357 ; 350353 ;
Abstract
There is presented an optical screen suitable for taking a picture by placing it between the object and a photosensitive material. The optical screen has a specific means for controlling the difference in transmission density in an optically heterogeneous pattern and/or the specific area of the lower transmission density portions, typically an electrochromic display device. By use of such a single optical screen having a variable optically heterogeneous pattern, cumbersome operations for displacing one screen for another in the prior art can be obviated.