Cathode for image intensifier tube having reduced veiling glare

Details Cathode for image intensifier tube having reduced veiling glare Cathode for image intensifier tube having reduced veiling glare

1988-08-18

1990-10-02

Wieder, Kenneth

Electric lamp and discharge devices

Photosensitive

With optical device

313371, 65 321, C03B 3200, H01J 4328

Patent

active

049610252

ABSTRACT:
An image intensifier tube has a faceplate formed of optical material. The outer surface of the faceplate has light receiving and light transmitting surfaces and a layer of a reduced metal oxide material for reducing stray light which is transmitted into the faceplate and reflected off of internal surfaces thereof. The layer has a blackened appearance and is formed by reducing the metal oxide of the faceplate material with hydrogen at a predetermined pressure and temperature to cause the blackening to reach a depth sufficient to reduce transmission of stray light therethrough.

REFERENCES:
patent: 3892582 (1975-07-01), Simms
patent: 3920463 (1975-11-01), Simms
patent: 4259406 (1981-03-01), Borrelli
patent: 4406973 (1983-09-01), Stowe
patent: 4475059 (1984-10-01), Sink
patent: 4498919 (1985-02-01), Mann
patent: 4661079 (1987-04-01), Harris et al.
patent: 4724357 (1988-02-01), Drinkwine
patent: 4760307 (1988-07-01), Howorth

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