The subaru coronagraphic extreme AO (SCExAO) system: Wavefront control and detection of exoplanets with coherent light modulation in the focal plane

Olivier Guyon, Frantz Martinache, Vincent Garrel, Frederic Vogt, Kaito Yokochi, Takashi Yoshikawa

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

34 Scopus citations

Abstract

The Subaru Coronagraphic Extreme-AO (SCExAO) system is designed for high contrast coronagraphic imaging at small angular separations, and is scheduled to see first light on the Subam Telescope in early 2011. The wavefront control architecture for SCExAO is optimized for scattered light control and calibration at small angular separations, and is described in this paper. Key subsystems for the SCExAO wavefront control architecture have been successfully demonstrated, and we report results from these tests and discuss their role in the SCExAO system. Among these subsystems, a technique which can calibrate and remove static and slow speckles which traditionally limit high contrast detections is discussed. A visible light lab prototype system at Subam Telescope recently demonstrated speckle halo reduction to 2e-7 contrast within 2 λ/D, and removal of static coherent speckles to 3e-9 contrast.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems II
EditionPART 1
DOIs
StatePublished - Oct 18 2010
Externally publishedYes
EventAdaptive Optics Systems II - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
NumberPART 1
Volume7736
ISSN (Print)0277-786X

Other

OtherAdaptive Optics Systems II
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Keywords

  • Adaptive optics
  • Coronagraphy
  • Exoplanets

ASJC Scopus subject areas

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

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    Guyon, O., Martinache, F., Garrel, V., Vogt, F., Yokochi, K., & Yoshikawa, T. (2010). The subaru coronagraphic extreme AO (SCExAO) system: Wavefront control and detection of exoplanets with coherent light modulation in the focal plane. In Adaptive Optics Systems II (PART 1 ed.). [773624] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7736, No. PART 1). https://doi.org/10.1117/12.857878