15 July 2008 Autonomous phase retrieval control for calibration of the Palomar Adaptive Optics system
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Abstract
An autonomous wavefront sensing and control software suite (APRC) has been developed as a method to calibrate the internal static errors in the Palomar Adaptive Optics system. An image-based wavefront sensing algorithm, Adaptive Modified Gerchberg-Saxton Phase Retrieval (MGS), provides wavefront error knowledge upon which actuator command voltages are calculated for iterative wavefront control corrections. This automated, precise calibration eliminates non-common path error to significantly reduce AO system internal error to the controllable limit of existing hardware, or can be commanded to prescribed polynomials to facilitate high contrast astronomy. System diagnostics may be performed through analysis of the wavefront result generated by the phase retrieval software.
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Siddarayappa Bikkannavar, Siddarayappa Bikkannavar, Catherine Ohara, Catherine Ohara, Mitchell Troy, Mitchell Troy, } "Autonomous phase retrieval control for calibration of the Palomar Adaptive Optics system", Proc. SPIE 7015, Adaptive Optics Systems, 70155K (15 July 2008); doi: 10.1117/12.790676; https://doi.org/10.1117/12.790676
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