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. 30, 1991
Filed:
Feb. 21, 1989
Applicant:
Inventor:
Joseph Lindmayer, Potomac, MD (US);
Assignee:
Quantex Corporation, Rockville, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; G01J / ; H05B / ; B66D / ;
U.S. Cl.
CPC ...
250339 ; 2503381 ; 250347 ; 2504841 ; 2504861 ; 25230145 ; 2523 / ;
Abstract
An efficient energy upconversion unit is optically coupled to a photomultiplier. The upconversion unit receives incident infrared electromagnetic energy of longer wavelengths and emits, in response, visible light of shorter wavelengths to which the photomultiplier is more responsive. Through such energy upconversion, the sensitivity of the photomultiplier is extended to much longer infrared wavelengths. The upconversion unit is a photoluminescent material specially formulated to have minimal phosphorescence so as to minimize noise.