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:
Feb. 02, 1999
Filed:
Dec. 17, 1996
Keith A Jacobson, Flower Mound, TX (US);
Val J Herrera, Double Oak, TX (US);
James A Harder, Bedford, TX (US);
Raytheon TI Systems, Inc., Lewisville, TX (US);
Abstract
An image detection system (10) includes a derotation optics assembly (24) that stabilizes images viewed from a scene (14) by individual detector elements (31) in a focal plane array (32). The derotation optics assembly (24) also is used in providing scene based calibration to the individual detector elements (31). The derotation optics assembly (24) places images viewed from the scene (14) in a first rotation position. The individual detector elements (31) collect scene based energy at the first rotation position. The derotation optics assembly (24) places images viewed from the scene (14) in a second rotation position. The individual detector elements (31) collect scene based energy at the second rotation position. Comparisons are made among outputs of the individual detector elements (31) at the first and second rotation positions. Correction factors for each of the individual detector elements (31) are adjusted in response to the comparisons in order to compensate for the differing voltage offsets and gains among the individual detector elements (31).