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:
Jun. 08, 1976
Filed:
Feb. 28, 1975
Applicant:
Inventor:
John Roschen, Irvine, CA (US);
Assignee:
Aeronutronic Ford Corporation, Blue Bell, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250226 ; 2502 / ; 2502 / ; 250339 ; 350316 ;
Abstract
Two photoelectric detector elements, having substantially different response wavelengths, are mounted in a housing in cascade relationship. The outer element is selected to be transparent to the response wavelength of the inner element and it is provided with an integral filter that is transmissive at the response wavelength of the inner element. Anti-reflective coatings are used to minimize reflective losses.