The Subaru coronagraphic extreme AO (SCExAO) system: Visible imaging mode

Vincent Garrei, Olivier Guyon, Pierre Baudoz, Frantz Martinache, Frederic Vogt, Yoshikawa Takashi, Yokochi Kaito, Faustine Cantalloube

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

2 Citations (Scopus)

Abstract

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system is an instrument designed to be inserted between the Subaru AO188 system and the infrared HiCIAO camera in order to greatly improve the contrast in the very close (less than 0.5") neighbourhood of stars. Next to the infrared coronagraphic path, a visible scientific path, based on a EMCCD camera, has been implemented. Benefiting from both Adaptive Optics (AO) correction and new data processing techniques, it is a powerful tool for high angular resolution imaging and opens numerous new science opportunities. We propose here a new image processing algorithm, based on the selection of the best signal for each spatial frequency. A factor 2 to 3 in Střehl ratio is obtained compared to the AO long exposure time depending on the image processing algorithm used and the seeing conditions. The system is able to deliver diffraction limited images at 650 nm (17 mas FWHM).We also demonstrate that this approach offers significantly better results than the classical select, shift and add approach (lucky imaging).

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7736
EditionPART 1
DOIs
StatePublished - 2010
Externally publishedYes
EventAdaptive Optics Systems II - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

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

Fingerprint

Extreme Adaptive Optics
Adaptive optics
adaptive optics
Imaging
Adaptive Optics
Imaging techniques
image processing
Image Processing
Image processing
EMCCD
Cameras
cameras
Infrared radiation
High Angular Resolution
Path
Infrared Camera
Full width at half maximum
angular resolution
Stars
Diffraction

Keywords

  • Adaptive optics methods
  • Data analysis techniques
  • High angular resolution instrumentation
  • High angular resolution techniques
  • Image processing
  • Instrumentation

ASJC Scopus subject areas

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

Cite this

Garrei, V., Guyon, O., Baudoz, P., Martinache, F., Vogt, F., Takashi, Y., ... Cantalloube, F. (2010). The Subaru coronagraphic extreme AO (SCExAO) system: Visible imaging mode. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7736). [77365V] https://doi.org/10.1117/12.857874

The Subaru coronagraphic extreme AO (SCExAO) system : Visible imaging mode. / Garrei, Vincent; Guyon, Olivier; Baudoz, Pierre; Martinache, Frantz; Vogt, Frederic; Takashi, Yoshikawa; Kaito, Yokochi; Cantalloube, Faustine.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010. 77365V.

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

Garrei, V, Guyon, O, Baudoz, P, Martinache, F, Vogt, F, Takashi, Y, Kaito, Y & Cantalloube, F 2010, The Subaru coronagraphic extreme AO (SCExAO) system: Visible imaging mode. in Proceedings of SPIE - The International Society for Optical Engineering. PART 1 edn, vol. 7736, 77365V, Adaptive Optics Systems II, San Diego, CA, United States, 6/27/10. https://doi.org/10.1117/12.857874
Garrei V, Guyon O, Baudoz P, Martinache F, Vogt F, Takashi Y et al. The Subaru coronagraphic extreme AO (SCExAO) system: Visible imaging mode. In Proceedings of SPIE - The International Society for Optical Engineering. PART 1 ed. Vol. 7736. 2010. 77365V https://doi.org/10.1117/12.857874
Garrei, Vincent ; Guyon, Olivier ; Baudoz, Pierre ; Martinache, Frantz ; Vogt, Frederic ; Takashi, Yoshikawa ; Kaito, Yokochi ; Cantalloube, Faustine. / The Subaru coronagraphic extreme AO (SCExAO) system : Visible imaging mode. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010.
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