Arbitrarily Small Pupils in Layer-Oriented Multi-Conjugate Adaptive Optics

Details Arbitrarily Small Pupils in Layer-Oriented Multi-Conjugate Adaptive Optics Arbitrarily Small Pupils in Layer-Oriented Multi-Conjugate Adaptive Optics

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasp..117..860r&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 117, Issue 834, pp. 860-869.

Physics

Optics

3

Scientific paper

Layer-oriented Multi-Conjugate Adaptive Optics (MCAO), from a strictly optical point of view, is a sort of three-dimensional anamorphic relay of the atmosphere in which the turbulence is sensed within a small volume where a few detectors can be placed in a variety of combinations discussed elsewhere. In its original form, this approach imposes a practical limit on the minimum size of the reimaged pupils and hence requires large-format detectors with an equivalent pixel size that can be 1 to 2 orders of magnitude larger than what is available using the current technology. We show here that such a limit can be easily overcome without losing any of the advantages, both practical and fundamental, offered by the layer-oriented approach. Some alternative techniques, characterized by some practical disadvantages, are sketched in order to possibly inject new ideas into the MCAO domain.

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