Parallax free optical sighting device
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United States of America Patent
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Feb 23, 1993
Grant Date -
N/A
app pub date -
May 8, 1990
filing date -
May 10, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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