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:
Jan. 12, 1993
Filed:
Feb. 27, 1991
Applicant:
Inventor:
Kevin A Hadfield, Chelmsford, GB;
Assignee:
EEV Limited, Essex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358219 ; 358217 ; 358211 ;
Abstract
The high voltage power supply of an image intensifier is operated intermittently to minimize the effect on a resulting intensified image of interference produced by the power supply, the input capacitance of the intensifier maintaining the high voltage at an acceptable level when the power supply is not operating. When used in conjunction with a video camera, the power supply may be allowed to operate only during the frame synch and/or line synch periods. A shutter may inhibit operation of the image intensifier while its power supply is operating.