Electro-Optical Technique For Suppressing Vibration-Induced Line-Of-Sight Errors

Robert L. Light; Jackson H. Priest; Larry D. McTigue

doi:10.1117/12.965585

4 October 1979 Electro-Optical Technique for Suppressing Vibration-Induced Line-Of-Sight Errors

Robert L. Light, Jackson H. Priest, Larry D. McTigue

Proceedings Volume 0187, System Aspects of Electro-optics; (1979) https://doi.org/10.1117/12.965585
Event: 1979 Huntsville Technical Symposium, 1979, Huntsville, United States

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%.

Citation Download Citation

Robert L. Light, Jackson H. Priest, and Larry D. McTigue "Electro-Optical Technique for Suppressing Vibration-Induced Line-Of-Sight Errors", Proc. SPIE 0187, System Aspects of Electro-optics, (4 October 1979); https://doi.org/10.1117/12.965585

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