Absolute piston phasing of segmented-mirror optical systems using depth-modulated white-light interferometry

Richard F. Horton; Ernest E. Huber; Leonas A. Bernotas; L. G. B. Yee; A. V. Roberts; J. M. Norton; Edward G. Corbett; Ronald A. Humphreys

doi:10.1117/12.19263

1 July 1990 Absolute piston phasing of segmented-mirror optical systems using depth-modulated white-light interferometry

Richard F. Horton, Ernest E. Huber, Leonas A. Bernotas, L. G. B. Yee, A. V. Roberts, J. M. Norton, Edward G. Corbett, Ronald A. Humphreys

Author Affiliations +

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19263
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

A method of phasing segmented-mirror systems using a new form of white-light radial-shear interferometer is presented. The device was used in a laboratory proof-of-concept demonstration to phase two elements of an annularly segmented mirror. This co-phasing was achieved both manually and with low-bandwidth closed-loop servo control using a new and perhaps simpler modulation technique than that proposed previously. The configuration used in the demonstration is described, together with some initial results.

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Richard F. Horton, Ernest E. Huber, Leonas A. Bernotas, L. G. B. Yee, A. V. Roberts, J. M. Norton, Edward G. Corbett, and Ronald A. Humphreys "Absolute piston phasing of segmented-mirror optical systems using depth-modulated white-light interferometry", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19263

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