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. 10, 1992
Filed:
Oct. 18, 1990
Katsuyuki Kinoshita, Shizuoka, JP;
Tatsuya Matsumura, Shizuoka, JP;
Hamamatsu Photonics K. K., Shizuoka, JP;
Abstract
Electrons emitted from a photocathode in response to incident X-rays are accelerated and focused onto a microchannel plate (MCP). The electrons multiplied by the MCP are converted into a visible light image by a phosphor screen. An envelope tube is curved at a halfway portion, and the electrons are deflected by a deflection coil so as to travel along the curved envelope tube and enter the MCP. Even if X-rays are transmitted from the photocathode, they do not enter the MCP directly and hardly contribute to the background noise. A limiting aperture ring may further be employed to prevent the X-rays reflected by the inside wall of the envelope tube from entering the MCP.