Helmet sight including a graticule image with increasing deviati

Details Helmet sight including a graticule image with increasing deviati Helmet sight including a graticule image with increasing deviati

1992-02-11

1993-04-06

Henry, Jon W.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, 340705, G02B 2710

Patent

active

052008568

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.

REFERENCES:
patent: 3666887 (1972-05-01), Freeman
patent: 4909459 (1990-03-01), Patterson

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