X-ray image intensifier tube having a photocathode and a scintil

Details X-ray image intensifier tube having a photocathode and a scintil X-ray image intensifier tube having a photocathode and a scintil

1993-02-23

1994-06-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313103CM, H01J 4014

Patent

active

053191897

ABSTRACT:
An X-ray image intensifier tube includes a scintillator screen for converting ionizing radiation into light radiation or near-visible radiation, a microchannel array for achieving electron multiplication, and a photoelectrode positioned directly on an input face of the microchannel array. The input face of the microchannel array is coated with an electrically conductive layer which directly contacts the photocathode. The present design eliminates strict spacing requirements between the photocathode and the microchannel array and allows the photocathode and the microchannel array to operate at a single potential rather than requiring separate potentials. The requirement of a separate support for the scintillator screen is also obviated since the scintillator screen is formed on the input face of the microchannel array.

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