Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1989-05-24
1990-03-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313103CM, H01J 4014
Patent
active
049123149
ABSTRACT:
A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core material. The fiber bundles located around the inside edge of the glass tube are replaced by support fibers having both a core and a cladding of a material which is non-etchable under the above-described conditions. The assembly of the tube, bundles and support fibers is heated to fuse the tube, bundles and support fibers together. The etchable core material is then removed and the assembly sliced into wafers. The inner surface of each of the claddings which bound the channel formed after removal of the core material is rendered electron emissive by reduction of the lead oxide by hydrogen gas. Metal films are deposited onto the opposed surfaces of each of the wafers to form contacts.
REFERENCES:
patent: 3693005 (1972-09-01), Clement
patent: 3979621 (1976-09-01), Yates
patent: 3979637 (1976-09-01), Siegmund
patent: 4385092 (1983-05-01), Singer
ITT Corporation
Nelms David C.
Twomey Thomas N.
Werner Mary C.
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