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Proceedings Paper

Electro-Optical Technique For Suppressing Vibration-Induced Line-Of-Sight Errors
Author(s): Robert L. Light; Jackson H. Priest; Larry D. McTigue
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Paper Abstract

An optical path error suppression system was developed for a helicopter-mounted pointing and tracking system. Tests show the system can measure both static (thermal) and dynamic (vibration) angular changes of less than 5 microradians (1 arc second) between the folding mirror surfaces in the optical path line of sight. Collimated rays from a pulsed laser diode are projected along the optical path. A dichroic mirror returns the diode wavelength to a detector. The detector signals are processed into elevation and azimuth angular error components. A feedback controller converts the error signals into corrective commands to the servo-driven stabilized mirror. Tests of the system which simulated the helicopter vibration environment showed RMS line-of-sight errors were reduced from 56 µR to 7 µR, an improvement of 800%.

Paper Details

Date Published: 4 October 1979
PDF: 8 pages
Proc. SPIE 0187, System Aspects of Electro-optics, (4 October 1979); doi: 10.1117/12.965585
Show Author Affiliations
Robert L. Light, U. S. Army Missile Research and Development Command (United States)
Jackson H. Priest, Boeing Aerospace Company (United States)
Larry D. McTigue, Boeing Aerospace Company (United States)

Published in SPIE Proceedings Vol. 0187:
System Aspects of Electro-optics
Harold B Jeffreys, Editor(s)

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