Optical element of a parallax free sight

Details Optical element of a parallax free sight Optical element of a parallax free sight

1994-04-28

1995-08-08

Turner, Samuel A.

Optics: measuring and testing

Fiducial instruments

Reticle lies outside viewing path

33241, G02B 2734

Patent

active

054403871

ABSTRACT:
A parallax free sight has an optical element, preferably arranged at one end of an elongated light channel. A concave side thereof is parabolically shaped and provided with a partially reflecting layer, in the focal point of which is arranged a light emitting means. The element is moulded in one piece of a plastic material, preferably polycarbonate, and an opposite, convex side is elliptically or hyperbolically shaped, such that any light beam hitting it from the outside continues straight through it with minimal deviation.

REFERENCES:
patent: 3942901 (1976-03-01), Ekstrand
patent: 3963356 (1976-06-01), Wiklund
patent: 4346995 (1982-08-01), Morris
patent: 4402605 (1983-09-01), Ekstrand
patent: 4804858 (1989-02-01), Jorlov et al.
patent: 4806007 (1989-02-01), Bindon
patent: 4940324 (1990-07-01), Nichols
patent: 4945646 (1990-08-01), Ekstrand
patent: 5003697 (1991-04-01), Hampton
patent: 5189555 (1993-02-01), Jorlov

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