Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1994-10-28
1996-04-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250207, 313524, H01J 4014
Patent
active
055064035
ABSTRACT:
An X-ray image intensifier has a vacuum envelope consisting of glass, and an input window consisting of aluminum and having a sectional meridian radius of curvature which increases from the central portion of the input window to the peripheral portion thereof is arranged on the input side of the vacuum envelope with a metal holding ring and a Kovar ring. An input phosphor surface is arranged adjacent to the inner surface side of the input window, and an X-ray image incident through the input window is converted into a photoelectron image. In order to minimize an influence caused by scattering of X-rays or .gamma.-rays incident through the input window, an input substrate is brought as close to the input window as possible. A coaxial cylindrical focusing electrode and an annular focusing electrode are arranged on the side wall in the vacuum envelope, and an anode is arranged on an output end side. An output window is formed on the output side of the anode, and an output phosphor member is arranged on the inner surface side of the output window. A transmittance with respect to a radiation beam increases in inverse proportion to the energy of the radiation beam. A transmittance abruptly increases in an area extending from the intermediate portion of the input window to the outermost periphery of the input window.
REFERENCES:
patent: 3697795 (1972-10-01), Braun et al.
patent: 4331898 (1982-05-01), Shimizu et al.
patent: 4740683 (1988-04-01), Noji et al.
patent: 4870473 (1989-09-01), Sugimori
patent: 4960987 (1990-10-01), Frank
patent: 4996414 (1991-02-01), Frank et al.
patent: 5212590 (1995-05-01), Bols
Patent Abstracts of Japan, vol. 16, No. 441 (E-1264), Sep. 14, 1992, JP-A-04 154 029, May 27, 1992.
Patent Abstracts of Japan, vol. 5, No. 103 (E-064), Jul. 3, 1981, JP-A-56 045 556, Apr. 25, 1981.
Kubo Hiroshi
Sato Shozo
Yamada Hitoshi
Yoshida Atsuya
Kabushiki Kaisha Toshiba
Nichols Steven L.
Westin Edward P.
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