Share Email Print
cover

Proceedings Paper

Simultaneous angular alignment of segmented mirrors using sinusoidal pattern analysis
Author(s): Heejoo Choi; Isaac Trumper; Matthew Dubin; Wenchuan Zhao; Dae Wook Kim
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A segmented mirror is one of the most promising solutions to build an extremely large aperture telescope to reveal the secrets of the universe. In this manuscript, we present a simultaneous angle alignment method for segmented mirrors. By taking the displayed sinusoidal pattern reflecting off the mirrors, the tip-tilt angles are measured with 0.8 μrad resolution for a flat mirror. Due to the efficient calculation using Fourier analysis, the total measurement time for seven flat mirrors is 0.07 s. In addition, a multiplexed sinusoidal pattern is adapted to resolve the intrinsic 2π ambiguity problem in a sinusoidal signal. The presented method can measure any number of segmented mirrors provided that the camera’s field of view can cover them all simultaneously.

Paper Details

Date Published: 22 August 2017
PDF: 6 pages
Proc. SPIE 10377, Optical System Alignment, Tolerancing, and Verification XI, 103770G (22 August 2017); doi: 10.1117/12.2275197
Show Author Affiliations
Heejoo Choi, College of Optical Sciences, The Univ. of Arizona (United States)
Isaac Trumper, College of Optical Sciences, The Univ. of Arizona (United States)
Matthew Dubin, College of Optical Sciences, The Univ. of Arizona (United States)
Wenchuan Zhao, College of Optical Sciences, The Univ. of Arizona (United States)
Institute of Optics and Electronics (China)
Dae Wook Kim, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 10377:
Optical System Alignment, Tolerancing, and Verification XI
José Sasián; Richard N. Youngworth, Editor(s)

© SPIE. Terms of Use
Back to Top