Cathode ray tube comprising a photodeflector

Details Cathode ray tube comprising a photodeflector Cathode ray tube comprising a photodeflector

1990-08-28

1992-10-20

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313439, 250213VT, H01J 2974

Patent

active

051573032

ABSTRACT:
A cathode ray tube includes an electrostatic deflection system along the path of an electron beam e.sub.f and between an electron source and a display screen. The deflection system includes at least an electrostatic photodeflector including a photodetector which, in response to an incident light radiation, creates electric charges e.sub.p which modify the electric deflection field of the photodeflector. The photodeflector may be made up of three electrodes or two electrodes so that the electron beam e.sub.f and the electric charges e.sub.p generated are or are not situated in the same space. The photodetector may be a photocathode or a photodiode. The structure may be repetitive in order to form a distributed photodeflector along the path of the electron beam e.sub.f. The cathode ray tube may be used as part of an oscilloscope.

REFERENCES:
patent: 3774236 (1973-11-01), Schlesinger

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