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. 07, 1996
Filed:
Mar. 22, 1994
Hiromichi Tonami, Kyoto, JP;
Takahisa Nishikawa, Nagaokakyou, JP;
Takayuki Takemoto, Kyoto, JP;
Yutaro Kimura, Kyoto, JP;
Keiichi Hiragaki, Takatsuki, JP;
Hidetoshi Kishimoto, Kyoto, JP;
Tatsuya Shimizu, Kyoto, JP;
Shiro Oikawa, Shiga, JP;
Tutomu Katou, Hatano, JP;
Shirou Suzuki, Yokosuka, JP;
Toshio Yamagishi, Kawasaki, JP;
Kenkichi Tanioka, Tama, JP;
Shimadzu Corporation, Kyoto, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
An X-ray image pickup tube converts a transmitted X-ray image into electric signals. The pickup tube includes a target structure having a fluorescent element, and a translucent conductive film for receiving a high voltage, with a photoconductive film laminated thereupon. The fluorescent element receives transmitted X rays in a two-dimensional distribution, and converts them into visible rays in a two-dimensional distribution. The translucnet conductive film is optically coupled to a surface of the fluorescent element opposite from an X-ray incident surface thereof. The photoconductive film includes an amorphors semiconductor layer which converts the visible rays transmitted in a two-dimensional distribution through the translucent conductive film, into electric charges in a two-dimensional distribution, and which multiplies the electric charges in the two-dimensional distribution based on electric fields formed by the high voltage applied to the translucent conductive film. The pickup tube also has a signal reading device in the form of an electron gun or switching elements for scanning a surface of the photoconductive film, as electric signals, a two-dimensional electric potential distribution occurring on the photoconductive film.