First diffraction-limited astronomical images with adaptive optics

Details First diffraction-limited astronomical images with adaptive optics First diffraction-limited astronomical images with adaptive optics

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...230l..29r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 230, no. 2, April 1990, p. L29-L32. Research supported by the European Souther

Physics

Optics

74

Adaptive Optics, Astronomical Observatories, Diffraction Limited Cameras, Image Processing, Infrared Radiation, Seeing (Astronomy), Atmospheric Effects, Atmospheric Turbulence, Binary Stars, Diffraction Patterns

Scientific paper

For the first time in ground-based astronomy, diffraction-limited imaging through atmospheric turbulence is achieved in real time with adaptive optics. The 'come-on' adaptive optics prototype system has been tested at the 1.52 m telescope of the Observatoire de Haute Provence, giving diffraction-limited images at near infrared wavelengths (2.2 to 5 microns). This letter presents the first results and their analysis, which demonstrate the considerable gain in resolution and sensitivity achieved by adaptive optics. A close binary (Gamma-2 And) is resolved at 2.23 microns, when another star (Gamma-1 And), 9.6 arcsec apart, is used as reference for the wavefront sensing at 0.6 micron.

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