CFHT adaptive optics: first results at the telescope

O. Lai; Jean-Pierre Veran; Francois J. Rigaut; Daniel Rouan; Pierre Gigan; Francois Lacombe; Pierre J. Lena; Robin Arsenault; Derrick A. Salmon; James Thomas; David Crampton; J. Murray Fletcher; James R. Stilburn; Corinne Boyer; Pascal Jagourel

doi:10.1117/12.269121

21 March 1997 CFHT adaptive optics: first results at the telescope

O. Lai, Jean-Pierre Veran, Francois J. Rigaut, Daniel Rouan, Pierre Gigan, Francois Lacombe, Pierre J. Lena, Robin Arsenault, Derrick A. Salmon, James Thomas, David Crampton, J. Murray Fletcher, James R. Stilburn, Corinne Boyer, Pascal Jagourel

Author Affiliations +

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269121
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

The adaptive optics instrument adaptor for the 3.6 m Canada- France-Hawaii telescope (CFHT) is currently in the commissioning phase. The heart of the system is a 19 electrode bimorph mirror (1:6:12), used with a 19 sub-aperture, curvature wave-front sensor and a separate tip-tilt re-imaging mirror. The performance evaluated in the laboratory and on the sky are presented: the adaptive optics control system provides a 100 Hz servo bandwidth with modal control capabilities. We report astronomical images with median Strehl ratio of 20 (at 1.25 micrometer) to 60% (at 2.2 micrometer), with a FWHM of 0.1 arcsec and a sensitivity allowing image quality improvement with guide stars as faint as m_R equals 17.

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O. Lai, Jean-Pierre Veran, Francois J. Rigaut, Daniel Rouan, Pierre Gigan, Francois Lacombe, Pierre J. Lena, Robin Arsenault, Derrick A. Salmon, James Thomas, David Crampton, J. Murray Fletcher, James R. Stilburn, Corinne Boyer, and Pascal Jagourel "CFHT adaptive optics: first results at the telescope", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269121

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