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. 08, 1987
Filed:
May. 02, 1985
Robert W Klatt, Rancho Palos Verdes, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
In a system for imaging radiation of a subject (14), particularly infrared radiation, the radiation scanned past a set of detectors (12), each of which produces an output signal amplified by an individual amplifying channel. Each amplifying channel includes a forward amplifier (38) and a feedback amplifier (50), the latter driving a diode (46) to limit excursion of a detector signal to an amplitude which is sufficiently small to avoid saturation of the forward amplifier. The forward amplifier (38) is AC coupled between a detector (12) and an output display (18), the limiting action of the diode (46) preventing the buildup of excessive charge on the coupling capacitors (40, 42), thereby to permit a viewing of fine detail superposed on coarse detail of the subject being viewed. A low-pass filter (48) in the feedback branch provides a delayed response to the limiting action which permits the passage of high-frequency detail to be imaged on the display (18).