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:
Apr. 06, 1976
Filed:
Feb. 25, 1974
Richard M Malueg, Glendora, CA (US);
Actron Industries, Inc., Monrovia, CA (US);
Abstract
Fixed pattern noise compensation is provided for an array of detectors by premeasuring output signals of the detectors under a low (preferably at virtually absolute zero) level of uniform incident energy, converting the measured signal level of each detector to digital signals, and storing the digital signals in a memory for reading out in synchronism with scanning outputs of the detectors during normal system operation. The digital compensation signals are converted to analog form and subtracted from the output signals of the respective detectors during each successive scan cycle of the system operation. To eliminate error from random noise, several noise measurements may be averaged to produce the fixed pattern noise compensation signals.