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Proceedings Paper

Measuring phase errors of an array or segmented mirror with a single far-field intensity distribution
Author(s): Robert K. Tyson
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Paper Abstract

A technique for extracting the relative phase (piston) differences between telescopes of a phased array or segments of a mirror is examined. The analysis concentrates on examination of measuring the relative phase of three segments with a single far-field intensity distribution. The contour of the first minimum in the far-field diffraction spot is directly related to the relative phase differences between three segments or telescopes. The paper will address various methods for extracting the information and using it to phase the segments or telescopes. Restrictions to the technique and questions regarding uniqueness of the solution are addressed. Limitations due to finite resolution in the far-field, segment or telescope tilt, dynamic beam jitter, and higher-order aberrations are quantified by computer simulation. Methods of extending the technique to real-time control are proposed.

Paper Details

Date Published: 1 December 1991
PDF: 14 pages
Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); doi: 10.1117/12.48794
Show Author Affiliations
Robert K. Tyson, W.J. Schafer Associates, Inc. (United States)

Published in SPIE Proceedings Vol. 1542:
Active and Adaptive Optical Systems
Mark A. Ealey, Editor(s)

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