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:
Jan. 02, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventors:
Joseph Lindmayer, Potomac, MD (US);
Charles Y Wrigley, Ijamsville, MD (US);
Assignee:
Quantex Corporation, Rockville, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 313543 ;
Abstract
An efficient energy upconversion unit is optically coupled to a photocathode. The upconversion unit receives incident infrared electromagnetic energy of longer wavelengths and emits, in response, electromagnetic energy within a band of shorter wavelengths to which the photocathode is more responsive. Through such energy upconversion, the photoresponse of the cathode is extended to much longer infrared wavelengths.