Collimator gunsight

Details Collimator gunsight Collimator gunsight

1977-04-05

1979-01-30

Evans, F. L.

Optics: measuring and testing

Fiducial instruments

Reticle lies outside viewing path

33241, G02B 2734

Patent

active

041369637

ABSTRACT:
A collimator gunsight has a collimator lens, a transparent graticule in the focal plane of the lens, and a window behind the graticule. A small artificial light source is positioned between the graticule and the window but does not obscure the ambient light entering the window from illuminating the graticule. The graticule pattern has a first portion through which light from the artificial source can pass into the aperture of the collimator lens, and a second portion which diverts, e.g. by refraction, ambient light entering the window and by-passing the artificial source so as to fill the aperture of the lens.

REFERENCES:
patent: 3880529 (1975-04-01), Althause et al.

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