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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 11, Iss. 2 — Feb. 1, 1994
  • pp: 925–945

Adaptive optics for diffraction-limited infrared imaging with 8-m telescopes

D. G. Sandler, S. Stahl, J. R. P. Angel, M. Lloyd-Hart, and D. McCarthy  »View Author Affiliations


JOSA A, Vol. 11, Issue 2, pp. 925-945 (1994)
http://dx.doi.org/10.1364/JOSAA.11.000925


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Abstract

When equipped with adaptive optics, the coming generation of large 6–10-m telescopes can combine huge light grasp with very sharp images. We describe a specific design concept for recovery of diffraction-limited images in the 1.6- and the 2.2-μm atmospheric windows, yielding 0.05-arcsec resolution for an 8-m telescope. Our goal has been to achieve this performance routinely by not requiring above-average atmospheric conditions or the use of unusually bright nearby stars. Atmospheric blurring is sensed with a sodium laser beacon of a few watts. Image motion is sensed by starlight, with a quadrant detector that is sensitive to the broad infrared band in which photon flux is typically largest and the field star has been sharpened by laser-beacon correction that is shared with the science target. A detailed performance analysis shows that for typical conditions Strehl ratios of >25% are expected at 2.2 μm, with the probability of finding a sufficiently bright field star exceeding 50%.

© 1994 Optical Society of America

History
Original Manuscript: November 9, 1992
Manuscript Accepted: February 8, 1993
Published: February 1, 1994

Citation
D. G. Sandler, J. R. P. Angel, M. Lloyd-Hart, S. Stahl, and D. McCarthy, "Adaptive optics for diffraction-limited infrared imaging with 8-m telescopes," J. Opt. Soc. Am. A 11, 925-945 (1994)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-11-2-925


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