Low light level vision apparatus

Details Low light level vision apparatus Low light level vision apparatus

1980-03-27

1983-03-15

Buczinski, S. C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250213R, 350437, 350438, 350439, H01J 3150, H01J 4014

Patent

active

043768890

ABSTRACT:
Low light level or night vision apparatus, and particularly goggles, having an objective lens to focus incident light on to an image intensifier and a magnifier enabling an observer to view a magnified version of the intensified image includes a wavelength selective filter with a hole or aperture through which light of other wavelengths can pass, the wavelength selective filter or means associated with the hole or aperture being arranged to have a focussing effect so that light from a distant scene or object of a wavelength passed by the filter can be properly focussed on the image intensifier, and light from a near scene or object passing through the hole or aperture can simultaneously also be properly focussed on the image intensifier, so that either or both images can be viewed in a focussed condition without adjustment of the apparatus.

REFERENCES:
patent: 2926239 (1960-02-01), Skellett
patent: 3173012 (1965-03-01), Winter
patent: 3464757 (1969-09-01), Schmidt et al.
patent: 3633988 (1972-01-01), Farrar
patent: 3868504 (1975-02-01), Anderson
patent: 3915548 (1975-10-01), Opittek et al.
patent: 3971933 (1976-07-01), Adamson, Jr.

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