Optical alignment monitoring and stabilization using a liquid crystal television (LCTV)

Narasimha S. Prasad; Sean M. Doyle; Michael K. Giles

doi:10.1117/12.255134

28 October 1996 Optical alignment monitoring and stabilization using a liquid crystal television (LCTV)

Narasimha S. Prasad, Sean M. Doyle, Michael K. Giles

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Proceedings Volume 2810, Space Sciencecraft Control and Tracking in the New Millennium; (1996) https://doi.org/10.1117/12.255134
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Maintenance of laser beam alignment in optical systems is highly desirable for effective operation. In this paper, a LCTV-based alignment preserving scheme is discussed. We show that a laser beam can be aligned automatically to an accuracy of less than plus or minus 2 micrometer using a LCTV with an average pixel pitch of 85 micrometer. Due to simplicity and low cost, the proposed scheme is attractive for use in laser based optical systems that are used on airborne platforms.

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Narasimha S. Prasad, Sean M. Doyle, and Michael K. Giles "Optical alignment monitoring and stabilization using a liquid crystal television (LCTV)", Proc. SPIE 2810, Space Sciencecraft Control and Tracking in the New Millennium, (28 October 1996); https://doi.org/10.1117/12.255134

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KEYWORDS

Point spread functions

Optical alignment

Liquid crystals

Phase shift keying

Televisions

Polarization

Software

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