System for measuring the angular displacement of an object

Details System for measuring the angular displacement of an object System for measuring the angular displacement of an object

1988-05-26

1990-01-30

Tarcza, Thomas H.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

250203CT, 250203R, 356 1, G01C 100, G01J 120

Patent

active

048969621

ABSTRACT:
An improved helmet line of sight measuring system for determining the spatial location of a helmet and the line of sight of an observer wearing the helmet, both relative to a coordinate reference frame. A plurality of assemblies of light sources are distributed on the helmet each comprising three light sources positioned at the vertices of a triangle and a fourth light source outside the plane of the triangle. Optical means fixed in space relative to the coordinate reference frame image the light emitted by the light sources in at least one of the assemblies onto an area image sensor, thereby producing two-dimensional image data of the light sources on the plane of the image sensor. Computing means coupled to the area image sensor is thereby able to determine the spatial coordinates of the helmet from the image data.

REFERENCES:
patent: 4111555 (1978-09-01), Ellis
patent: 4193689 (1980-03-01), Reymond et al.
patent: 4314761 (1982-02-01), Reymond et al.
patent: 4315690 (1982-02-01), Trocellier et al.
patent: 4475814 (1984-10-01), Marche
patent: 4534650 (1985-08-01), Clerget et al.
patent: 4652917 (1987-03-01), Miller

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