Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1988-05-04
1989-08-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313525, H01J 3150, H01J 4014
Patent
active
048555878
ABSTRACT:
An X-ray image intensifier tube comprises an entrance window which is composed of a carbon fibre reinforced plastics foil which is covered with a metal layer. The plastics foil has a comparatively low absorption and the metal layers can be constructed so as to be sufficiently thin and from suitable materials such that only a low absorption occurs therein. The metal layers ensure that the entrance window is suitably vacuumtight and allow for simple vacuumtight connection of the entrance window to the further envelope.
REFERENCES:
patent: 4238043 (1980-12-01), Minami et al.
patent: 4331898 (1982-05-01), Shimizu et al.
"X,.gamma.,.beta.-Ray Detector Windows of Composite Material Replacing Beryllium in the 4.2-420K Temperature Range", Nuclear Istr. & Meth. in Phy. Res. (1986), Rimbert et al, pp. 95-99.
Colditz Johannes K. E.
Creusen Caspard H. J.
Chatmon Eric F.
Kraus Robert J.
Nelms David C.
U.S. Philips Corporation
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