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:
Oct. 02, 1990
Filed:
Aug. 18, 1988
Applicant:
Inventors:
Nils I Thomas, Roanoke, VA (US);
Albert F Tien, Buchanan, VA (US);
Kenneth A Brown, Buchanan, VA (US);
Assignee:
ITT Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ; H01J / ;
U.S. Cl.
CPC ...
313524 ; 313371 ; 65 321 ;
Abstract
An image intensifier tube has a faceplate formed of optical material. The outer surface of the faceplate has light receiving and light transmitting surfaces and a layer of a reduced metal oxide material for reducing stray light which is transmitted into the faceplate and reflected off of internal surfaces thereof. The layer has a blackened appearance and is formed by reducing the metal oxide of the faceplate material with hydrogen at a predetermined pressure and temperature to cause the blackening to reach a depth sufficient to reduce transmission of stray light therethrough.