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:
Aug. 11, 1987
Filed:
Mar. 31, 1986
Applicant:
Inventors:
Yoshikazu Iida, Chigasaki, JP;
Kenji Ishizuki, Tokyo, JP;
Assignee:
Nippon Kogaku K. K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354 21 ; 354480 ;
Abstract
An exposure control device for a camera is so structured that the film information recorded on the film or the cartridge is read, the reflection coefficient of the loaded film is determined based on the read film information and the termination of light emission of an electronic flash device or the start of run of a shutter curtain is controlled in accordance with the reflection coefficient so that the proper exposure is always obtained by the light emission control or the shutter control by the TTL direct light detection irrespective of the change of the reflection coefficient of the film.