X-ray image intensifier having columnar crystals having a cross

Details X-ray image intensifier having columnar crystals having a cross X-ray image intensifier having columnar crystals having a cross

1990-05-22

1991-09-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313526, 313525, H01J 3150, H01J 4014

Patent

active

050456822

ABSTRACT:
An X-ray image intensifier includes an input screen for converting incident X-ray into photoelectrons. The input screen has a substrate, a phosphor layer having a layer number of columnar crystals of a phosphor formed with gaps therebetween on the substrate, and a photoelectric layer directly or indirectly provided on the phosphor layer. The columnar crystals at a peripheral edge portion of the input screen are thinner than the columnar crystals at a central portion of the input screen.

REFERENCES:
patent: 4740683 (1988-04-01), Noji et al.
patent: 4935617 (1990-06-01), Anno et al.

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