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. 26, 1983
Filed:
May. 04, 1981
Applicant:
Inventor:
Takaaki Terasita, Minami-ashigara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354 31 ;
Abstract
A number of light receiving elements are used for measuring the brightness Bi of a number of parts of the scene and the maximum brightness Bmax and the minimum brightness Bmin are detected among the measured brightness values. Then, the scene brightness B is calculated by use of a formula: ##EQU1## Based on the scene brightness thus obtained, the aperture or shutter is controlled to obtain appropriate exposure. In case where the weighting coefficients for the number of light receiving elements are made equal to each other, the average brightness Bmean throughout the whole image is used.