Proximity image intensifier

Details Proximity image intensifier Proximity image intensifier

1991-03-15

1992-03-10

Howell, Janice A.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313526, H01J 3150

Patent

active

050952021

ABSTRACT:
A proximity image intensifier for use in a light amplifier in a high-sensitivity hand-held camera for broadcasting service or the like, which includes a photocathode for photoelectrically converting an optical image, a phosphor screen for receiving photoelectrons from the photocathode and producing an intensified optical image, and a high-voltage power supply for applying a high voltage across the photocathode and the phosphor screen. For protecting the phosphor screen from burnout due to a spot of incident light, a resistor is interposed in a power supply path at a position immediately before at least one of the photocathode and the phosphor screen to reduce an electrostatic capacitance between the photocathode and the phosphor screen.

REFERENCES:
patent: Re29233 (1977-05-01), Cuelenaere et al.
patent: 3619496 (1971-11-01), Lichtenstein
patent: 4087683 (1978-05-01), Lieb
patent: 4243905 (1981-01-01), van Geest et al.
patent: 4422008 (1983-12-01), Aramaki et al.
patent: 4755718 (1988-07-01), Patrick

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