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

Mamadou N'Diaye, Elodie Choquet, Laurent Pueyo, Erin Elliot, Marshall D. Perrin, J. Kent Wallace, Tyler Groff, Alexis Carlotti, Dimitri Mawet, Matt Sheckells, Stuart Shaklan, Bruce Macintosh, N. Jeremy Kasdin, Rémi Soummer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationTechniques and Instrumentation for Detection of Exoplanets VI
DOIs
StatePublished - 2013
EventTechniques and Instrumentation for Detection of Exoplanets VI - San Diego, CA, United States
Duration: Aug 26 2013Aug 29 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8864
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherTechniques and Instrumentation for Detection of Exoplanets VI
CountryUnited States
CitySan Diego, CA
Period8/26/138/29/13

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • Coronagraphy
  • High angular resolution
  • Wavefront control
  • Wavefront sensing

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