Accession Number : ADD001702

Title :   System for Measuring Rotation Using Polarized Light.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Van Buskirk,Lyman F

Report Date : 18 Feb 1975

Pagination or Media Count : 4

Abstract : The patent describes a system for sensing the rotational orientation of an object such as a pilot's helmet wherein a polarized surface backed by a reflective coating is mounted on the object and illuminated by a rotating, polarized laser beam. The beginning rotational position of the beam, and its position when its polarization matches the polarization of the object-mounted polarizer, are measured by an incremental digital encoder to determine the object's orientation.

Descriptors :   *Detectors, *Patents, Rotation, Light, Polarization, Photodetectors, Measurement, Helmets, Remote detectors

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE