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The Infrared Imaging Spectrograph (IRIS) for TMT: the ADC optical design

Phillips, Andrew C. and Suzuki, Ryuji and Larkin, James E. and Moore, Anna M. and Hayano, Yutaka and Tsuzuki, Toshihiro and Wright, Shelley A. (2016) The Infrared Imaging Spectrograph (IRIS) for TMT: the ADC optical design. 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. 9908A1. ISBN 978-1-5106-0196-3. http://resolver.caltech.edu/CaltechAUTHORS:20170216-103601637

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Abstract

We present the current optical design for the IRIS Atmospheric Dispersion Corrector (ADC). The ADC is designed for residual dispersions less than ~1 mas across a given passband at elevations of 25 degrees. Since the last report, the area of the IRIS Imager has increased by a factor of four, and the pupil size has increased from 75 to 90mm, both of which contribute to challenges with the design. Several considerations have led to the current design: residual dispersion, amount of introduced distortion, glass transmission, glass availability, and pupil displacement. In particular, it was found that there are significant distortions that appear (two different components) that can lead to image blur over long exposures. Also, pupil displacement increases the wave front error at the imager focus. We discuss these considerations, discuss the compromises, and present the final design choice and expected performance.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/12.2232952DOIArticle
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2544360PublisherArticle
https://arxiv.org/abs/1608.01690arXivDiscussion Paper
Additional Information:© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). The TMT Project gratefully acknowledges the support of the TMT collaborating institutions. They are the California Institute of Technology, the University of California, the National Astronomical Observatory of Japan, the National Astronomical Observatories of China and their consortium partners, the Department of Science and Technology of India and their supported institutes, and the National Research Council of Canada. This work was supported as well by the Gordon and Betty Moore Foundation, the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Canadian Universities for Research in Astronomy (ACURA), the Association of Universities for Research in Astronomy (AURA), the U.S. National Science Foundation, the National Institutes of Natural Sciences of Japan, and the Department of Atomic Energy of India.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
National Institutes of Natural Sciences of JapanUNSPECIFIED
Department of Atomic Energy (India)UNSPECIFIED
Subject Keywords:ADC, Atmospheric Dispersion Corrector, Atmospheric Dispersion Compensator, IRIS, InfraRed Imaging Spectrograph, Imager, Spectrograph
Record Number:CaltechAUTHORS:20170216-103601637
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170216-103601637
Official Citation:Andrew C. Phillips ; Ryuji Suzuki ; James E. Larkin ; Anna M. Moore ; Yutaka Hayano ; Toshihiro Tsuzuki ; Shelley A. Wright; The Infrared Imaging Spectrograph (IRIS) for TMT: the ADC optical design. Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 9908A1 (August 9, 2016); doi:10.1117/12.2232952.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74368
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:18 Feb 2017 04:25
Last Modified:18 Feb 2017 04:25

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