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:
Dec. 10, 1991
Filed:
Dec. 04, 1990
Marc Audion, Massy, FR;
Christian Pepin, Gif S/Yvette, FR;
Thomson-CSF, Puteaux, FR;
Abstract
Disclosed is an airborne optoelectronic system using a facetted port. There is provision for compensation means in the form of two prisms with variable index, each formed by a lateral facet and a second facet forming a cavity, within which the refractive index is adjusted by the control of the internal gas pressure. The variation in the pressure with the cavity is achieved by following a control point value depending notably on the altitude of the carrier and the orientation of the line of sight. This results in eliminating the doubling of the image which occurs when there is no compensation when the altitude of the carrier varies and when the incident flux is distributed among the facets. The disclosed device can be applied to optoelectronic systems for warplanes, the flight altitudes of which may vary widely.