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. 27, 1983
Filed:
Oct. 14, 1981
Jean L Beck, Paris, FR;
Jean F Le Bars, Paris, FR;
Yves A Emmanuelli, Paris, FR;
Denis Bargues, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The optoelectronic device comprises an optical element for producing an image scan and an optical element for focusing on an array of detectors. The detected signals are processed by amplifying circuits and a thermal-drift correcting unit comprising an occultation device having two states. A correction loop of the unit includes a memory for storing the values of amplifying circuit signals in the first state of the occultation device, a first circuit for subtracting the stored values from the amplifying circuit outputs in order to compensate for thermal drift, a measuring circuit for obtaining the mean value of the amplified videofrequency signals, and a second circuit for subtracting the mean value from the signal of each detector.