Image tube IR illuminator indicator

Details Image tube IR illuminator indicator Image tube IR illuminator indicator

1983-10-31

1985-10-01

Smith, Alfred E.

Radiant energy

Infrared-to-visible imaging

H01J 3150

Patent

active

045448442

ABSTRACT:
An infrared (IR) illuminator indicator which has a fiber optics light guide hat channels the IR radiation from an IR radiation source in the illuminator to the faceplate of an image tube as an indicator mark. The image tube converts the IR radiation to the visible spectrum. If the operator of the image tube attempts to operate the IR illuminator at large ranges, or if a near target is suddenly removed so that the IR radiation suddenly reached a much larger range, the image tube gain will suddenly increase to compensate for less reflected radiation. With the fiber optics light guide channeling a constant amount of IR radiation from the IR radiation source to the input of the faceplate, the enhanced gain of the image tube automatically brightens the indicator mark to the observer of the image tube and thus indicates the need to immediately turn off the IR radiation source to avoid detection by the enemy.

REFERENCES:
patent: 4000419 (1976-12-01), Crost et al.
patent: 4160907 (1979-07-01), Bly
patent: 4328516 (1982-05-01), Colpack et al.
patent: 4417814 (1983-11-01), Doliber

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