Tomographic phase diversity for non-common path ... - AO4ELT 2
Tomographic phase diversity for non-common path ... - AO4ELT 2
Tomographic phase diversity for non-common path ... - AO4ELT 2
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Pray<br />
PRAy = Phase Retrieval Algorithm in yorick<br />
Classical or tomographic. Can use zonal or modal<br />
(Zernike/DH/KL) “influence functions”.<br />
2D Gaussian kernel/object (<strong>for</strong> vibration modelling)<br />
Can fit focus scale, differential TT between stars<br />
Uses optimpack (yorick pluging from E.Thiebaut, main<br />
algorithm is VMLM-B: a variable metric method with<br />
limited memory requirements with optional bound<br />
constraints on the parameters)<br />
Fast. Typically 1 it/s <strong>for</strong> a GeMS case; 920 actuators /<br />
19x3 images on 64x64 arrays (typically reach a solution<br />
within a minute).<br />
OSA, AO Session, Toronto, July 10-14, 2011<br />
Wednesday, 28 September 11<br />
10
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