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. 21, 1987
Filed:
Dec. 27, 1985
Applicant:
Inventors:
Allan P Johnson, Minneapolis, MN (US);
Ronald W Shovan, Clearwater, FL (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; H01J / ;
U.S. Cl.
CPC ...
2503361 ; 2502 / ; 307311 ;
Abstract
A pair of photodetectors are electrically connected in series. A common interconnection point of the two photodetectors is electrically connected to the inverting input of an opertional amplifier to provide a signal indicative of visible light falling on one of the photodetectors. The other of the photodetectors is masked to block visible but allow a response to non-visible radiation in the form of gamma, x-rays and the like.