Photocathode having fiber optic faceplate containing glass havin

Details Photocathode having fiber optic faceplate containing glass havin Photocathode having fiber optic faceplate containing glass havin

1985-01-24

1986-01-07

Moore, David K.

Electric lamp and discharge devices

Photosensitive

With optical device

313527, 313542, 65 42, H01J 178, H01J 134, H01J 4006

Patent

active

045636141

ABSTRACT:
A photocathode arrangement comprises a body of semiconductor material, such as gallium arsenide which is bonded to a fiber optic face plate. A thin anti-reflection coating of silicon nitride is positioned between the body and the plate and forms an integral part of the bond. The properties of the glasses from which the fiber optic face plate is made are carefully chosen to minimize crystal dislocations which can be introduced into the body of gallium arsenide when it is bonded to the face plate. Such crystal dislocations can seriously impair the performance of the photocathode. It has been found that it is advantageous to use a glass having an annealing temperature of about 575.degree. C. or less. Because of high temperature processing steps, its softening temperature must be about 680.degree. C. or greater. The photocathode arrangement so formed is intended to constitute the input port of an image intensifier.

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patent: 3586895 (1971-06-01), Sowers et al.
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patent: 3959038 (1976-05-01), Gutierrez et al.
patent: 3960620 (1976-06-01), Ettenburg
patent: 4119363 (1978-10-01), Camlibel et al.
Kohl, Walter, Materials and Techniques for Electron Tubes, Reinhold, NY, 1960, pp. 608-609.

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