Image tube

Details Image tube Image tube

1980-01-22

1982-02-09

Willis, Davis L.

Electric lamp and discharge devices

Geiger-mueller type

250213VT, 313101, 313102, H01J 4000

Patent

active

043151841

ABSTRACT:
An improved image tube operable at higher voltage and gain with low noise levels wherein the electrodes include rolled end portions which extend away from the tube axis, and wherein all electrode surfaces are coated with light absorptive, low secondary electron emission characteristic, insulating material. Annular shields are disposed proximate an inlet and outlet tubulation to prevent deposition of alkali on the interior insulating ceramic envelope surfaces. An improved zoom electrode structure is provided which intercepts stray electrons while passing the focused beam to the target.

REFERENCES:
patent: Re28751 (1976-03-01), Ball
patent: 3683194 (1972-08-01), Levin et al.
patent: 3693018 (1972-09-01), Spicer
patent: 3716713 (1973-02-01), Levin
patent: 3795531 (1974-03-01), Spicer
patent: 3801849 (1974-04-01), Edgecumbe
patent: 3916240 (1975-10-01), Cuelenaere et al.
patent: 4087683 (1978-05-01), Lieb

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