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:
Sep. 01, 1981
Filed:
Nov. 20, 1979
Applicant:
Inventors:
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
2502 / ; 356152 ;
Abstract
A photoelectric direction finder in which the modulating and spatial filtering functions produced by the reticles are separated from the deviation measurement function resulting from a four quadrant detection, provided with a view to permitting a passive or semi-active bimodal operation. The reticles are determined transparent for the radiation emmited by an auxiliary laser illuminator modulated according to a modulation different from that provided by the reticles in the passive mode, while the processing and deviation measurement circuits have additional laser signal demodulation circuits and automatic or priority mode selection and switching circuits.