X-ray image intensifier with phosphor layer of varying thickness

Details X-ray image intensifier with phosphor layer of varying thickness X-ray image intensifier with phosphor layer of varying thickness

1987-03-30

1988-04-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313527, 313543, H01J 3150, H01J 4014

Patent

active

047406836

ABSTRACT:
An X-ray image intensifier includes an input surface and an output surface facing the input surface. The input surface has a base and a phosphor layer formed on the base and having a predetermined effective radius. The phosphor layer includes a thickest portion which has a thickness about 105 to 115% of a thickness of a center of the layer and is located in a region spaced from the center toward the periphery of the layer by a distance about 60 to 80% of the effective radius. The phosphor layer is formed so that the thickness is gradually increased from the center to the thickest portion and a region between the thickest portion and the periphery of the layer has a thickness about 50 to 100% of the thickness of the thickest portion.

REFERENCES:
patent: 3716713 (1973-02-01), Levin
patent: 4645971 (1987-02-01), Ricodeau

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