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:
Jul. 18, 1989
Filed:
Apr. 03, 1987
Thomson-CSF, Paris, FR;
Abstract
The system allows homing on a useful target to be obtained in the presence of considerable parasite sources, such as the sun, in the field of observation. It includes elements for the spatial and spectral discrimination of the infrared light sources, formed with a detector strip preceded by a fixed modulation grid, the uniaxial field scanning device, switchable electronic filtering, one band pass and the other low pass, and switching optical filtering, one with very narrow band and the other with wide band. The grid is preferably formed by herringbone patterned tracks. The narrow band filter may be centered towards 4.4 microns and the wide band filter covers 3 to 5 microns for providing homing of a missile by optical deviation heading measurement in a ground/air or sea/air defense system.