13 September 2012 Calibration strategy of the AOF
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Abstract
The AOF project will transform one of the VLT UT into an adaptive telescope. This configuration presents new challenges but also provides new opportunities for the integration of the Adaptive Optics in the global telescope control scheme and performance improvement. In particular the Interaction Matrix between the Deformable Mirror and Wavefront Sensor of the system cannot be measured on an artificial source, as there is no intermediate focal plane ahead of the Deformable Mirror. The baseline for the AOF is to use a Pseudo-Pynthetic IM, i.e. computer-generated but finetuned thanks to measured parameters of the system: Influence Functions, WFS characteristics, mis-alignments. This paper presents the control strategy of the AOF, the simulation code that will be used to generate the PSIM for the AOF, and the ideas for updating the Control Matrix depending on the estimation of the DM/WFS mis-registration.
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J. Kolb, P.-Y. Madec, M. Le Louarn, N. Muller, C. Béchet, "Calibration strategy of the AOF", Proc. SPIE 8447, Adaptive Optics Systems III, 84472D (13 September 2012); doi: 10.1117/12.926369; https://doi.org/10.1117/12.926369
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