Cathode ray tube with means for preventing backscatter from elec

Details Cathode ray tube with means for preventing backscatter from elec Cathode ray tube with means for preventing backscatter from elec

1986-12-01

1990-08-21

Weider, Kenneth

Electric lamp and discharge devices

Photosensitive

Secondary emitter type

313422, 313107, H01J 2980, H01J 4328

Patent

active

049509403

ABSTRACT:
In order to reduce contrast degradation in an electrostatically scanned flat cathode ray tube having a channel plate electron multiplier, due to back-scattered electrons entering channels remote from their origin, a coating of a material having a low back-scatter coefficient is applied over the input of the electron multiplier between the apertures therein. The surface texture of the material should be microscopically rough. The material can be applied to the first dynode or to an electrode electrically and physically connected to the first dynode. The acceptance angle of the channel plate electron multiplier may also be restricted.

REFERENCES:
patent: 4422005 (1983-12-01), Washington et al.
patent: 4544860 (1985-10-01), Guest et al.

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