Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1987-12-23
1989-04-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313 21, 313372, 313482, H01J 3150, H01J 4015
Patent
active
048250678
ABSTRACT:
An X-ray television apparatus includes an X-ray image intensifier and an imaging unit. The X-ray image intensifier converts an X-ray image into a visible image. The visible image is transmitted to the imaging unit by optical fiber bundles coupled with each other by a coupling mechanism. The imaging unit converts the visible image into an electrical signal of an image. Bolts are threadably engaged with a flat ring base provided to the X-ray image intensifier. By an elastic pressure of coil springs into which the bolts are inserted, a holding member provided to the coupling mechanism couples the imaging tube to the X-ray image intensifier via the optical fiber bundles. An electrostatic shielding film is formed on a surface of the holding member and prevents a pseudo signal generated by the X-ray image intensifier from entering the imaging unit, thereby reducing the noise components contained in the electrical signal of an image.
REFERENCES:
patent: 3058021 (1962-10-01), Dunn
patent: 3624442 (1971-11-01), Smithgall et al.
patent: 3638057 (1972-01-01), Janssen
patent: 4603250 (1986-07-01), Contini et al.
patent: 4633076 (1986-12-01), Butterwick
patent: 4758763 (1988-07-01), Gorton
Fujimoto Yuichi
Kabashima Kinya
Kawamura Shigeharu
Obata Yoshiharu
Kabushiki Kaisha Toshiba
Nelms David C.
Oen William L.
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