Camera tubes

Details Camera tubes Camera tubes

1981-11-27

1985-03-05

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313389, H01J 3138

Patent

active

045033544

ABSTRACT:
A photoconductive target camera tube provided to operate within a solenoid producing a uniform magnetic focusing field has a grid with a beam width defining aperture therein between the electron gun and the normally provided cylindrical anode. The aperture grid is mounted upon a ring of magnetic material which acts to reduce the magnitude of the focusing magnetic field at the plane of the aperture so to achieve a demagnification of the image of the aperture at the target with a consequent reduction in the beam spot size.

REFERENCES:
patent: 2892962 (1959-06-01), Ross
patent: 3471741 (1969-10-01), Cope et al.
patent: 3866079 (1975-02-01), Schut

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