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Estimation of normalized point-source sensitivity of segment surface specifications for extremely large telescopes

Seo, Byoung-Joon and Nissly, Carl and Troy, Mitchell and Angeli, George and Bernier, Robert and Stepp, Larry and Williams, Eric (2013) Estimation of normalized point-source sensitivity of segment surface specifications for extremely large telescopes. Applied Optics, 52 (18). pp. 4111-4122. ISSN 0003-6935. doi:10.1364/AO.52.004111. https://resolver.caltech.edu/CaltechAUTHORS:20130805-092952662

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Abstract

We present a method which estimates the normalized point-source sensitivity (PSSN) of a segmented telescope when only information from a single segment surface is known. The estimation principle is based on a statistical approach with an assumption that all segment surfaces have the same power spectral density (PSD) as the given segment surface. As presented in this paper, the PSSN based on this statistical approach represents a worst-case scenario among statistical random realizations of telescopes when all segment surfaces have the same PSD. Therefore, this method, which we call the vendor table, is expected to be useful for individual segment specification such as the segment polishing specification. The specification based on the vendor table can be directly related to a science metric such as PSSN and provides the mirror vendors significant flexibility by specifying a single overall PSSN value for them to meet. We build a vendor table for the Thirty Meter Telescope (TMT) and test it using multiple mirror samples from various mirror vendors to prove its practical utility. Accordingly, TMT has a plan to adopt this vendor table for its M1 segment final mirror polishing requirement.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1364/AO.52.004111 DOIArticle
http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-52-18-4111PublisherArticle
Additional Information:© 2013 Optical Society of America. Received 18 December 2012; revised 25 February 2013; accepted 25 February 2013; posted 1 May 2013 (Doc. ID 181977); published 12 June 2013. This research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, and was sponsored by the California Institute of Technology and the National Aeronautics and Space Administration. The authors gratefully acknowledge the support of the TMT partner institutions. They are the Association of Canadian Universities for Research in Astronomy (ACURA), the California Institute of Technology, and the University of California. 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 National Research Council of Canada, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Universities for Research in Astronomy (AURA), and the U.S. National Science Foundation.
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for Innovation (CFI)UNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of Canada (NRCC)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
Issue or Number:18
Classification Code:OCIS codes: (110.6770) Telescopes; (110.3925) Metrics
DOI:10.1364/AO.52.004111
Record Number:CaltechAUTHORS:20130805-092952662
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130805-092952662
Official Citation:Applied Optics, Vol. 52, Issue 18, pp. 4111-4122 (2013) http://dx.doi.org/10.1364/AO.52.004111
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39754
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Aug 2013 18:49
Last Modified:09 Nov 2021 23:46

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