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:
May. 30, 1978
Filed:
Jul. 12, 1976
Applicant:
Inventor:
Hendrik Mulder, Delft, NL;
Assignee:
N. V. Optische Industrie 'De Oude Delft', Delft, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313102 ; 2502 / ; 313101 ;
Abstract
An image intensifier tube of the proximity focus type has a transparent cathode window with a curved inner surface and an anode window formed by a fiber optics plate having an inner surface curved to be substantially complementary to the cathode window inner surface. The arrangement mitigates the so-called 'chicken-wire' effect and other flaws inherent in intensifiers using fiber optics at both the cathode and the anode ends. It is cheaper in manufacture and may be made of smaller depth, thereby simplifying its incorporation in existing apparatus.