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:
Oct. 03, 1989
Filed:
Jan. 03, 1989
Applicant:
Inventor:
Thomas M Woolfolk, Gordenville, VA (US);
Assignee:
Sperry Marine Inc., Charlottesville, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358211 ; 35821319 ;
Abstract
Automatic light control apparatus for a television camera system utilizing a gated image intensifier wherein a pair of laser diodes illuminate, respectively, a pair of avalanche photodiodes to apply switching voltages to the image intensifier. Low-level gating signals are utilized to activate the laser diodes. The laser diodes are gated on and off in complementary fashion whereby the image intensifier is turned on for pulse intervals inversely proportional to the brightness of the scene being televised.