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:
Nov. 14, 1989
Filed:
Mar. 11, 1988
Hiroshi Kubo, Ootawara, JP;
Atsuya Yoshida, Ootawara, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An X-ray image intensifier includes a vacuum envelope having an input window for receiving X-rays, an input fluorescent screen for converting X-rays received through the input window into light, a photoelectric layer for converting the light, which was converted by the input fluorescent screen, into electrons, an anode and a converging electrode constitute an electron lens for accelerating and converging the electrons converted by the photoelectric layer, and an output fluorescent screen for converting the electrons, which were accelerated and converged by the electron lens, into a visible image. The light transmission coefficient of a peripheral portion of the input fluorescent screen is larger than that of a central portion thereof.