A Caltech Library Service

High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design

N'Diaye, Mamadou and Choquet, Élodie and Pueyo, Laurent and Elliot, Erin and Perrin, Marshall D. and Wallace, J. Kent and Groff, Tyler and Carlotti, Alexis and Mawet, Dimitri and Sheckells, Matt and Shaklan, Stuart and Macintosh, Bruce and Kasdin, N. Jeremy and Soummer, Rémi (2013) High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design. In: Techniques and Instrumentation for Detection of Exoplanets VI. Proceedings of SPIE. No.8864. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 88641K . ISBN 9780819497147.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central obstruction, support structures, segmentation) that makes high-contrast imaging more challenging. We are developing a new high-contrast imaging testbed at STScI to provide an integrated solution for wavefront control and starlight suppression on complex aperture geometries. We present our approach for the testbed optical design, which defines the surface requirements for each mirror to minimize the amplitude-induced errors from the propagation of out-of-pupil surfaces. Our approach guarantees that the testbed will not be limited by these Fresnel propagation effects, but only by the aperture geometry. This approach involves iterations between classical ray-tracing optical design optimization, and end-to-end Fresnel propagation with wavefront control (e.g. Electric Field Conjugation / Stroke Minimization). The construction of the testbed is planned to start in late Fall 2013.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
N'Diaye, Mamadou0000-0002-1721-3294
Choquet, Élodie0000-0002-9173-0740
Pueyo, Laurent0000-0003-3818-408X
Perrin, Marshall D.0000-0002-3191-8151
Groff, Tyler0000-0001-5978-3247
Mawet, Dimitri0000-0002-8895-4735
Macintosh, Bruce0000-0003-1212-7538
Soummer, Rémi0000-0003-2753-2819
Additional Information:© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 26 September 2013. This work is supported by the National Aeronautics and Space Administration under Grant NNX12AG05G issued through the Astrophysics Research and Analysis (APRA) program (Soummer, PI). The authors acknowledge all the people involved during the process of the testbed design. In particular, they warmly thank Matt Kenworthy, Emmanuel Hugot and Marc Ferrari for fruitful discussions.
Funding AgencyGrant Number
Subject Keywords:high angular resolution, coronagraphy, wavefront sensing, wavefront control
Series Name:Proceedings of SPIE
Issue or Number:8864
Record Number:CaltechAUTHORS:20150521-130036036
Persistent URL:
Official Citation:Mamadou N'Diaye ; Elodie Choquet ; Laurent Pueyo ; Erin Elliot ; Marshall D. Perrin, et al. " High-contrast imager for complex aperture telescopes (HiCAT): 1. testbed design ", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88641K (September 26, 2013); doi:10.1117/12.2023718;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57743
Deposited By: Ruth Sustaita
Deposited On:21 May 2015 20:30
Last Modified:10 Nov 2021 21:54

Repository Staff Only: item control page