Image intensifier tube with increased contrast ratio

Details Image intensifier tube with increased contrast ratio Image intensifier tube with increased contrast ratio

1983-07-08

1985-10-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313105CM, H01J 3150

Patent

active

045502510

ABSTRACT:
The contrast ratio of an image intensifier of the photocathode-amplifier-phosphor type is increased by using a fiber optic plate of which the thickness is reduced to such extent that the plate may not be able to function as a vacuum seal or an electrical insulator when a typical voltage for the operation of the intensifier is applied to the phosphor layer. This relatively thin fiber optic plate is placed entirely inside a vacuum, protected from the atmospheric pressure by a thick output window plate which is optically transparent.

REFERENCES:
patent: 3581098 (1971-05-01), Hoover
patent: 3813489 (1974-05-01), Ramsay et al.
patent: 3864037 (1975-02-01), Johnson
patent: 3868536 (1975-02-01), Enck, Jr.
patent: 3971932 (1976-07-01), Sewell et al.
patent: 4031552 (1977-06-01), Bosserman et al.
patent: 4076978 (1978-02-01), Brennan et al.
patent: 4255666 (1981-03-01), Wang et al.

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