2-6 September 2013
STIAS Conference Centre
Africa/Johannesburg timezone

Layer-oriented adaptive optics for extended objects

3 Sep 2013, 11:40
STIAS Conference Centre

STIAS Conference Centre

Stellenbosch Institute for Advanced Study Wallenberg Research Centre 10 Marais Road Stellenbosch South Africa www.stias.ac.za


Dr Aglae Kellerer (Durham University)

Abstract content <br>(Max 300 words)<br><a href="http://indico.saip.org.za/getFile.py/access?resId=0&materialId=2&confId=28" target="_blank">Special Chars</a>

A key feature of future adaptive-optical systems will be multi-conjugate (MCAO) correction. There are fundamentally two different approaches to MCAO – star-oriented and layer-oriented.

Up to now, MCAO for extended objects uses exclusively a star-oriented approach, which is a natural extension of a conventional AO system. The field-size of a star-oriented MCAO system is however limited due to the difficulty involved in the tomographic reconstruction.

We argue that extended objects – e.g. the retina and biological tissues – are ideal targets for layer-oriented MCAO systems because the wavefront distortions can be sensed continuously over the entire field-of-view. Interestingly, in a layer-oriented approach, the correction is improved with increasing field-sizes. A practical implementation, however, meets current technological limits in terms of detector sizes and read-out frequencies.

Primary author

Dr Aglae Kellerer (Durham University)


Prof. Richard Myers (Durham University)

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