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Proceedings Paper

Visible-wavelength diffraction-limited imaging using low-order adaptive optics
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Paper Abstract

We explore the possibilities and limitations of an adaptively corrected dilute-aperture optical telescope. In such a system a non-redundant pupil geometry is coupled with low degree-of- freedom adaptive optics (AO) to achieve a diffraction-limited imaging capability with high fidelity. We show that such a configuration can operate successfully at optical wavelengths where the problems of point-spread-function (PSF) calibration place significant limitations on conventional adaptive optics. A key component of our system is a suite of interferometric wavefront sensors which guarantees that the system operates in a regime where sensitivity to fluctuations in the seeing is reduced. By operating with a sparse pupil, the total number of active components is minimized, as are difficulties associated with implementing the interferometric wavefront sensors. We plan to demonstrate such a system using the University of Durham ELECTRA AO system in the very near future.

Paper Details

Date Published: 25 August 1995
PDF: 9 pages
Proc. SPIE 2534, Adaptive Optical Systems and Applications, (25 August 1995); doi: 10.1117/12.217765
Show Author Affiliations
David F. Buscher, Univ. of Durham (United Kingdom)
Andrew Peter Doel, Univ. of Durham (United Kingdom)
Christopher A. Haniff, Mullard Radio Astronomy Observatory/Univ. of Cambridge (United Kingdom)
Richard W. Wilson, Royal Greenwich Observatory (United Kingdom)

Published in SPIE Proceedings Vol. 2534:
Adaptive Optical Systems and Applications
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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