Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics
1993; IOP Publishing; Volume: 402; Linguagem: Inglês
10.1086/186705
ISSN1538-4357
AutoresMichael Lloyd‐Hart, R. Dekany, B. A. McLeod, David Wittman, D’nardo Colucci, Donald McCarthy, R. Angel,
Tópico(s)Stellar, planetary, and galactic studies
Resumoview Abstract Citations (11) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Direct 75 Milliarcsecond Images from the Multiple Mirror Telescope with Adaptive Optics Lloyd-Hart, M. ; Dekany, R. ; McLeod, B. ; Wittman, D. ; Colucci, D. ; McCarthy, D. ; Angel, R. Abstract We report results from an adaptive optics system designed to provide imaging at the diffraction limit of resolution in the near-infrared at the Multiple Mirror Telescope (MMT). For the present experiment, the aperture consisted of five of the six primary mirrors of the MMT, operating as a coherently phased array. The largest components of the atmospherically induced wave-front aberration are the fluctuations in mean phase between the segments. These errors were derived in real time from the Fourier transform of short-exposure stellar images at 2.2 microns and corrected at an image of the telescope pupil with piston motion from a segmented adaptive mirror. At a correction rate of 43 Hz, this level of adaptive control resulted in an integrated image with a clear diffraction-limited component of 0.075 arcsec FWHM. This stabilized component is present directly in the light arriving at the detector and is not the result of postprocessing. We discuss future improvements to our adaptive wave-front control and its application to astronomical observations. Publication: The Astrophysical Journal Pub Date: January 1993 DOI: 10.1086/186705 Bibcode: 1993ApJ...402L..81L Keywords: Adaptive Optics; Atmospheric Effects; Image Processing; Mirrors; Telescopes; Adaptive Control; Fourier Transformation; Image Analysis; Wave Fronts; Astronomy; TURBULENCE; ATMOSPHERIC EFFECTS; TECHNIQUES: INTERFEROMETRIC; TECHNIQUES: IMAGE PROCESSING full text sources ADS |
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