Polycrystalline selenium imaging devices

Details Polycrystalline selenium imaging devices Polycrystalline selenium imaging devices

1975-09-15

1979-01-02

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Image pickup tube

313 94, H01J 2945, H01J 3138

Patent

active

041329180

ABSTRACT:
A low dark current vidicon is disclosed having a target comprising a thallium doped layer of hexagonal, or trigonal, polycrystalline selenium. A mechanically stable blocking contact for holes is also provided by a transparent tin oxide electrode in intimate proximity to the layer along a major surface of a faceplate in contact with the target.

REFERENCES:
patent: 2687484 (1954-08-01), Weimer
patent: 3350595 (1967-10-01), Kramer
patent: 3405298 (1968-10-01), Dresner
patent: 3861913 (1975-01-01), Chiou
patent: 3922579 (1975-11-01), Goto et al.
Goto et al., (PAL System) DIN: S4356 0203 (313-386); pp. 1-3 cited.
Nijland, "SOME INVESTIGATIONS ON THE ELECTRICAL PROPERTIES OF HEXAGONAL SELENIUM," Philips Research Reports; vol. 9, 1954; TK 1 P49; pp. 259-294.

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