Image tube device

Details Image tube device Image tube device

1990-10-18

1992-03-10

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313382, 313389, H01J 3126

Patent

active

050952439

ABSTRACT:
Electrons emitted from a photocathode in response to incident X-rays are accelerated and focused onto a microchannel plate (MCP). The electrons multiplied by the MCP are converted into a visible light image by a phosphor screen. An envelope tube is curved at a halfway portion, and the electrons are deflected by a deflection coil so as to travel along the curved envelope tube and enter the MCP. Even if X-rays are transmitted from the photocathode, they do not enter the MCP directly and hardly contribute to the background noise. A limiting aperture ring may further be employed to prevent the X-rays reflected by the inside wall of the envelope tube from entering the MCP.

REFERENCES:
patent: 2760096 (1956-08-01), Longini
patent: 4902927 (1990-02-01), Kinoshita

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