Parallax free optical sighting device

Optical: systems and elements – Single channel simultaneously to or from plural channels

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Details

359727, 356247, 356251, 33233, G02B 1700, G02B 2310, F41G 300

Patent

active

051895552

ABSTRACT:
A parallax free sight which utilizes a concave-convex lens with a parabolic shaped optical surface attached to one end of a light channel, the concave side of the lens faces into the light channel, the perimeter dimensions of the lens is adapted to the rectangular shape and dimensions of the light channel, with the longer sides of the rectangular lens perimeter positioned in a horizontal plane when the sight is in use. A transparent body is attached to the other end of the light channel. A light emitting source is arranged at the focal point of the concave side of the lens, between the lens and the transparent body. The light source can be a light emitting material or an electrical light source, powered by a rechargeable battery or a solar cell, or both. A light reflective layer is attached to the concave side of the lens to only reflect light of the wavelengths corresponding to the light emitted by the light emitting source.

REFERENCES:
patent: 3942901 (1976-03-01), Ekstrand
patent: 3963356 (1976-06-01), Wiklund
patent: 4118126 (1978-10-01), Noble
patent: 4346995 (1982-08-01), Morris
patent: 4402605 (1983-09-01), Ekstrand
patent: 4665622 (1987-05-01), Idan
patent: 4743765 (1988-05-01), Ekstrand
patent: 4804858 (1989-02-01), Jorlov et al.
patent: 4830381 (1989-05-01), Sellner
patent: 4859058 (1989-08-01), Ekstrand
patent: 4940324 (1990-07-01), Nichols
patent: 4945646 (1990-08-01), Ekstrand

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