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:
Mar. 24, 1981
Filed:
Dec. 26, 1979
William T Mostyn, Jr, Waco, TX (US);
Helena Laboratories Corporation, Beaumont, TX (US);
Abstract
In an optical system including a light source and a photodetector, a circuit and method for compensating for degradation of the optical system which may include deterioration in the intensity of the light source, caused by a variety of factors such as dirt, aging of the light source, etc., or dirt on the photodetector. The intensity of the light from the light source as received by the photodetector is repeatedly measured and an average value determined which accurately indicates the intensity of the light received. Subsequent use of the optical system includes comparison to the most recent average value of light received by the photodetector. Hence the present system eliminates the need for repeated calibration of the optical system by providing the same effect as though the system were being repeatedly and automatically calibrated to account for system degradation.