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:
Mar. 01, 1983
Filed:
May. 11, 1981
Applicant:
Inventors:
Richard J Coppa, Westwood, MA (US);
Marie T Rodriguez, Somerville, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354 27 ; 354 33 ; 354195 ;
Abstract
A photographic exposure control system of the type for controlling both the duration of a photographic exposure interval and the amount of artificial illumination provided during the exposure interval includes the capability of increasing the amount of artificial illumination in direct corresponding relation with increases in the camera-to-subject distance and the ambient scene light intensity in order to maintain the same proportional contribution to the film exposure from the ambient artificial light during a fill flash exposure.