Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics

M. Lloyd-Hart, R. Dekany, B. Mcleod, D. Wittman, D. Colucci, Donald W Mccarthy, J Roger P Angel

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 μm 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 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.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume402
Issue number2 PART 2
StatePublished - Jan 10 1993

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adaptive optics
telescopes
mirrors
diffraction
wave fronts
Fourier transform
adaptive control
near infrared
phased arrays
pupils
pistons
aberration
apertures
detectors
experiment

Keywords

  • Atmospheric effects
  • Techniques: image processing
  • Techniques: interferometric
  • Turbulence

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics. / Lloyd-Hart, M.; Dekany, R.; Mcleod, B.; Wittman, D.; Colucci, D.; Mccarthy, Donald W; Angel, J Roger P.

In: Astrophysical Journal, Vol. 402, No. 2 PART 2, 10.01.1993.

Research output: Contribution to journalArticle

Lloyd-Hart, M, Dekany, R, Mcleod, B, Wittman, D, Colucci, D, Mccarthy, DW & Angel, JRP 1993, 'Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics', Astrophysical Journal, vol. 402, no. 2 PART 2.
Lloyd-Hart M, Dekany R, Mcleod B, Wittman D, Colucci D, Mccarthy DW et al. Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics. Astrophysical Journal. 1993 Jan 10;402(2 PART 2).
Lloyd-Hart, M. ; Dekany, R. ; Mcleod, B. ; Wittman, D. ; Colucci, D. ; Mccarthy, Donald W ; Angel, J Roger P. / Direct 75 milliarcsecond images from the Multiple Mirror Telescope with adaptive optics. In: Astrophysical Journal. 1993 ; Vol. 402, No. 2 PART 2.
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