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Proceedings Paper

Impact of optical distortions on fiber positioning in the dark energy spectroscopic instrument
Author(s): Stephen Kent; Michael Lampton; A. Peter Doel; David Brooks; Tim Miller; Robert Besuner; Joe Silber; Ming Liang; David Sprayberry; Charles Baltay; David Rabinowitz
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Paper Abstract

The Dark Energy Spectroscopic Instrument, to be located at the prime focus of the Mayall telescope, includes a wide field corrector, a 5000 fiber positioner system, and a fiber view camera. The mapping of the sky to the focal plane, needed to position the fibers accurately, is described in detail. A major challenge is dealing with the large amount of distortion introduced by the optics (of order 10% scale change), including time-dependent non-axisymmetric distortions introduced by the atmospheric dispersion compensator. Solutions are presented to measure or mitigate these effects.

Paper Details

Date Published: 9 August 2016
PDF: 10 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088F (9 August 2016); doi: 10.1117/12.2232689
Show Author Affiliations
Stephen Kent, Fermi National Accelerator Lab. (United States)
Michael Lampton, Space Sciences Lab., Univ. of California, Berkeley (United States)
A. Peter Doel, Univ. College London (United Kingdom)
David Brooks, Univ. College London (United Kingdom)
Tim Miller, Space Sciences Lab., Univ. of California, Berkeley (United States)
Robert Besuner, Space Sciences Lab., Univ. of California, Berkeley (United States)
Joe Silber, Lawrence Berkeley National Lab. (United States)
Ming Liang, National Optical Astronomy Observatory (United States)
David Sprayberry, National Optical Astronomy Observatory (United States)
Charles Baltay, Yale Univ. (United States)
David Rabinowitz, Yale Univ. (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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