Electric lamp and discharge devices – Photosensitive – Secondary emitter type
Patent
1994-07-28
1996-02-20
O'Shea, Sandra L.
Electric lamp and discharge devices
Photosensitive
Secondary emitter type
313105CM, H01J 4300
Patent
active
054931690
ABSTRACT:
Microchannel plates for use in image intensifiers and night vision devices having both improved gain and signal-to-noise ratio are provided. The microchannel plates provide an initial electron impact area having a surface electron-emissivity coefficient greater than one (1) that is not occluded by low electron-emissivity conductive coatings. In one embodiment angulated deposition of a coating material is used to provide a high electron-emissivity initial electron-impact area while in another embodiment nonmetallic electrodes provide increased amplification of a signal electron. Besides improving gain and sensitivity, the microchannel plates of the present invention provide a higher signal-to-noise ratio, better resolution, high open area ratios and are significantly more cost effective to produce.
REFERENCES:
patent: 3564323 (1971-02-01), Maeda
patent: 3634712 (1972-01-01), Orthuber
patent: 3974411 (1976-08-01), Faulkner et al.
patent: 4051403 (1977-09-01), Feingold et al.
patent: 4737013 (1988-04-01), Wilcox
patent: 5132586 (1992-07-01), Boulais et al.
patent: 5159231 (1992-10-01), Feller et al.
Gilpin Mark
Lin Po-Ping
Parish Hubert G.
Pierle Robert L.
Litton Systems Inc.
O'Shea Sandra L.
Patel Ashok
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