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Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system

Arriaga, Pauline and Fitzgerald, Michael P. and Lyke, James E. and Campbell, Randall D. and Wizinowich, Peter L. and Adkins, Sean M. and Matthews, Keith Y. (2016) Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system. In: Ground-based and Airborne Instrumentation for Astronomy VI. Proceedings of SPIE. No.9908. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 990835. ISBN 9781510601956. http://resolver.caltech.edu/CaltechAUTHORS:20170216-134523959

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Abstract

The design and performance of astronomical instruments depend critically on the total system throughput as well as the background emission from the sky and instrumental sources. In designing a pupil stop for background- limited imaging, one seeks to balance throughput and background rejection to optimize measurement signal-to-noise ratios. Many sources affect transmission and emission in infrared imaging behind the Keck Observatory’s adaptive optics systems, such as telescope segments, segment gaps, secondary support structure, and AO bench optics. Here we describe an experiment, using the pupil-viewing mode of NIRC2, to image the pupil plane as a function of wavelength. We are developing an empirical model of throughput and background emission as a function of position in the pupil plane. This model will be used in part to inform the optimal design of cold pupils in future instruments, such as the new imaging camera for OSIRIS.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/12.2233068DOIArticle
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2544179PublisherArticle
ORCID:
AuthorORCID
Fitzgerald, Michael P.0000-0002-0176-8973
Additional Information:© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors with to thank the generous support of the G. B. Moore Foundation (award 3847).
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore Foundation3847
Record Number:CaltechAUTHORS:20170216-134523959
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170216-134523959
Official Citation:Pauline Arriaga ; Michael P. Fitzgerald ; James E. Lyke ; Randall D. Campbell ; Peter L. Wizinowich ; Sean M. Adkins and Keith Y. Matthews " Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system ", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990835 (August 9, 2016); doi:10.1117/12.2233068; http://dx.doi.org/10.1117/12.2233068
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74387
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:16 Feb 2017 22:19
Last Modified:26 Mar 2019 17:46

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