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. 07, 1977
Filed:
Apr. 05, 1976
Applicant:
Inventors:
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
2502 / ; 244-316 ; 2502 / ;
Abstract
A radiant energy detection system for discriminating between radiation from a target and ambient radiation wherein optical receiver means is arranged to produce two images of the observed field which are staggered along the direction of displacement of modulating grids by an amount substantially equal to the diameter of the target image, and which includes filtering means and attenuating means to balance the radiation levels in the case of ambient background radiation.