Low light level and infrared viewing system

Details Low light level and infrared viewing system Low light level and infrared viewing system

1977-09-06

1979-04-03

Smith, Alfred E.

Radiant energy

Infrared-to-visible imaging

250315R, 250315A, 250331, H01J 3149, G03G 1300, H01J 3150

Patent

active

041479327

ABSTRACT:
A viewing system for improving an image, and particularly designed for use with infrared and low light level inputs. A viewing system having first and second electrodes mounted in spaced relation with a gap therebetween, an electric power source for producing an electric field in the gap attracting electrons toward one electrode and positive charge toward the other, a photoresponsive layer on the gap face of the first electrode with radiation directed onto the layer through the first electrode producing an electrostatic charge image at the gap, and a plurality of electrophoretic particles dispersed in a dielectric liquid in the gap, with the particles being selectively deposited at the second electrode as a function of the electrostatic charge image. In the preferred embodiment, the deposited particles are viewed with a dark field illumination system whereby light is scattered to the viewing position by the deposited particles. Cascaded systems and systems incorporating image intensifiers are also disclosed.

REFERENCES:
patent: 3668106 (1972-06-01), Ota
patent: 3965352 (1976-06-01), Allan et al.

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