Impact of optical distortions on fiber positioning in the dark energy spectroscopic instrument

Stephen Kent; Michael Lampton; A. Peter Doel; David Brooks; Tim Miller; Robert Besuner; Joe Silber; Ming Liang; David Sprayberry; Charles Baltay; David Rabinowitz

doi:10.1117/12.2232689

9 August 2016 Impact of optical distortions on fiber positioning in the dark energy spectroscopic instrument

Stephen Kent, Michael Lampton, A. Peter Doel, David Brooks, Tim Miller, Robert Besuner, Joe Silber, Ming Liang, David Sprayberry, Charles Baltay, David Rabinowitz

Author Affiliations +

Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 99088F (2016) https://doi.org/10.1117/12.2232689
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

Citation Download Citation

Stephen Kent, Michael Lampton, A. Peter Doel, David Brooks, Tim Miller, Robert Besuner, Joe Silber, Ming Liang, David Sprayberry, Charles Baltay, and David Rabinowitz "Impact of optical distortions on fiber positioning in the dark energy spectroscopic instrument", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088F (9 August 2016); https://doi.org/10.1117/12.2232689

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