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:
Jul. 12, 1994
Filed:
Oct. 13, 1992
Johannes K Colditz, Heerlen, NL;
Willem H Diemer, Heerlen, NL;
Laurens H Jonk, Heerlen, NL;
Engelbertus Rongen, Heerlen, NL;
Johannes W Scheuermann, Heerlen, NL;
Henricus M De Vrieze, Eindhoven, NL;
August L Simons, Heerlen, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An exit section of an X-ray image intensifier tube, including an the exit phosphor screen, exit window and basic optical system, is optimized so as to achieve a high light yield, low optical aberration and a high resolution. The exit window notably has a pre-compensation geometry for curvature of the image plane of the basic optical system, or the exit window an interference filter, or the exit phosphor layer contains a layer of a comparatively slow phosphor in addition to a layer of a customary phosphor in order to achieve noise-suppressing image integration.