NVG compatible red light

Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means

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350311, 250213VT, G02B 522

Patent

active

047799420

ABSTRACT:
Night Vision Goggle compatible red lighting in which the red light does not adversely affect the gain of the night vision goggles yet is visible to the unaided eye. The red light is filtered by a filter which transmits at least about 80% of the visible spectrum within a range up to about 640 nanometers in wavelength and inhibits the transmission of 99.9% of said red light above about 720 nanometers in wavelength on the electromagnetic spectrum within the spectral sensitivity of the night vision goggles.

REFERENCES:
patent: 3858977 (1975-01-01), Baird et al.
patent: 4068260 (1978-01-01), Ohneda et al.
patent: 4179181 (1979-12-01), Chang
patent: 4370025 (1983-01-01), Sato et al.
patent: 4376889 (1987-06-01), Swift
patent: 4395629 (1983-07-01), Sasano et al.
patent: 4556599 (1985-12-01), Sato et al.

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