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:
Mar. 03, 1992
Filed:
Jun. 29, 1990
Applicant:
Inventor:
Gerardus Van Aller, Heerlen, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 313527 ;
Abstract
Via the shape of the photocathode surface and the geometry and potential distribution of electrodes of the electron-optical system, an X-ray image intensifier tube is optimized for reduction of the transit time variance for photoelectrons from the photocathode surface to a photoelectron detector. The photoelectron detector, on which an image need not be formed in this case, has, for example, a comparatively small entrance surface and is arranged in or near a cross-over of the photoelectrons.