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Near-infrared AO coronagraph design for giant telescopes

Ellerbroek, Brent and Buchroeder, Richard (2003) Near-infrared AO coronagraph design for giant telescopes. In: Future Giant Telescopes. Proceedings of SPIE. No.4840. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 404-414. ISBN 9780819446190.

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We describe the adaptive optical (AO) requirements, optical design, and expected performance of a near-infrared AO coronagraph for a 30 meter class giant telescope. The optical design of the instrument consists of back-to-back finite conjugate relays, each containing a collimated space between a pair of toric mirrors. The first collimated space contains the atmospheric dispersion compensator and the AO components, which are a tip/tilt mirror, a MEMS deformable mirror, and a beamsplitter for the wavefront sensing path. An occulting disk or similar focal plane mask is located at the intermediate image between the two relays, and a Lyot stop is placed at the pupil plane in the second relay. The required AO order of correction for a Strehl ratio of 0.9 at a wavelength of 2.2 microns is about 150 by 150, and the required control bandwidth is 42 Hz. The limiting magnitude at this level of performance is estimated to be 10.4.

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Additional Information:© 2003 Society of Photo-optical Instrumentation Engineers (SPIE). This work was supported by the New Initiatives Office, which is project of the National Optical Astronomical Observatory (NOAO) and Gemini Observatory. The Gemini Observatory is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini Partnership: the National Science Foundation (United States), the Particle Physics and Astronomy Research Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), CNPq (Brazil), and CONICET (Argentina).
Funding AgencyGrant Number
National Optical Astronomical ObservatoryUNSPECIFIED
Gemini ObservatoryUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Australian Research CouncilUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)UNSPECIFIED
Subject Keywords:Adaptive optics, giant telescopes, coronagraphs
Series Name:Proceedings of SPIE
Issue or Number:4840
Record Number:CaltechAUTHORS:20190116-102146610
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Official Citation:Brent L. Ellerbroek, Richard A. Buchroeder, "Near-infrared AO coronagraph design for giant telescopes," Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92315
Deposited By: Tony Diaz
Deposited On:18 Jan 2019 04:04
Last Modified:16 Nov 2021 03:49

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