Helmet sight including a graticule image with increasing deviation with helmet displacement
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United States of America Patent
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-
Apr 6, 1993
Grant Date -
N/A
app pub date -
Feb 11, 1992
filing date -
Feb 12, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A helmet sight comprises a collimator for projection of the image of a sighting graticule into the ocular field of the wearer of the helmet and sensors for measurement of the angular position of the helmet with respect to a structure, such as the cockpit of an aircraft. The collimator for projection gives the graticule a position whose angular deviation .DELTA.a, .DELTA.b with respect to a reference orientation linked to the helmet has remained an increasing function of the angular displacements of the helmet with respect to the reference structure.
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