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Proceedings Paper

Development Of An Interferometric Encoder For High Resolution Angular Measurements
Author(s): R. J. Tansey; S. Holly
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Paper Abstract

lhis report demonstrates the use of a grating in a lateral heterodyne interferometer to make high resolution angular measurements at high speed. Depending on choice of grating, various range, resolution, and speed tradeoffs can be made. Details of two systems will be shown which use gratings with a pitch of 25 microns and 2 microns. The system using a 25 micron grating can track a 20 cm. shaft at 25 rad/sec with 284 nanoradian resolution, and the 2 micron system the same shaft at 2 rad/sec and 36 nanoradian resolution.

Paper Details

Date Published: 3 May 1988
PDF: 10 pages
Proc. SPIE 0887, Acquisition, Tracking, and Pointing II, (3 May 1988); doi: 10.1117/12.944210
Show Author Affiliations
R. J. Tansey, Rockwell International (United States)
S. Holly, Rockwell International (United States)

Published in SPIE Proceedings Vol. 0887:
Acquisition, Tracking, and Pointing II
James E. Kimbrell, Editor(s)

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