X-ray image intensifier having a support ring that prevents impl

Details X-ray image intensifier having a support ring that prevents impl X-ray image intensifier having a support ring that prevents impl

1989-03-16

1989-09-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313524, 313544, H01J 3150, H01J 4014

Patent

active

048704733

ABSTRACT:
This invention relates to an X-ray image intensifier for intensifying and reproducing an image of an object, by use of X-ray and the like. An evacuated envelope of the image intensifier is constituted by a cylindrical glass body having an open end and a closed end, an X-ray input window covering the open end of the body, and a support ring for providing a hermetical seal between the body and the window at the open end. The window is constituted by a domed portion which expands outwardly from the evacuated envelope, a flange portion which is formed around the peripheral edge of the window and has a flat bonding surface which extends perpendicular to the axis of the evacuated envelope, with a curved portion forming a transitional area between the domed and flange portions. The support ring is bonded to the flange portion, at the flat bonding surface, and has a smaller inner diameter than the outer diameter of the curved portion. Further, the inner end of the ring member is located inward of the inner end of the flange portion.

REFERENCES:
patent: 3515924 (1970-06-01), Moegenbier
patent: 4331898 (1982-05-01), Shimizu et al.
patent: 4422008 (1983-12-01), Aramaki et al.
patent: 4423351 (1983-12-01), Sugimori et al.
patent: 4611144 (1986-09-01), Minami

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