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:
Jun. 04, 1991
Filed:
Apr. 21, 1989
Applicant:
Inventor:
Richard C Rice, Oconomowoc, WI (US);
Assignee:
Camtronics, Ltd., Wukesha, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G01J / ;
U.S. Cl.
CPC ...
364525 ; 36457101 ; 356404 ; 356443 ; 382 41 ;
Abstract
Apparatus creates an image on photographic film in which the light intensity of the light source for exposing the film is calibrated to a predetermined value by measuring the light intensity of the light exposure while varying the digital form of the drive signal for controlling the intensity. A successive approximation sequence is used until the intensity approximates the predetermined value.