Electrostatically focusing type image pickup tubes and method of

Details Electrostatically focusing type image pickup tubes and method of Electrostatically focusing type image pickup tubes and method of

1977-07-25

1979-09-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313389, 313460, 250213VT, H01J 2946, H01J 2956

Patent

active

041692390

ABSTRACT:
The electron lens of an electrostatically focusing type image pickup tube comprises three coaxially arranged cylindrical electrodes and the inner diameters thereof are decreased from the side of a target toward an electron gun. The electron lens is assembled by successively fitting the three electrodes over a mandrel, the outer diameter thereof varying stepwisely in accordance with the inner diameters of the three electrodes, and then interconnecting the three electrodes by axially extending insulating supporting rods.

REFERENCES:
patent: 3364372 (1968-01-01), Bennett

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