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25 August 1995 Visible-wavelength diffraction-limited imaging using low-order adaptive optics
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David F. Buscher, Andrew Peter Doel, Christopher A. Haniff, and Richard W. Wilson "Visible-wavelength diffraction-limited imaging using low-order adaptive optics", Proc. SPIE 2534, Adaptive Optical Systems and Applications, (25 August 1995); doi: 10.1117/12.217765;

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