PSF calibration using the Lyot-based low order wavefront sensor telemetry: first simulations

Garima Singh; Julien Lozi; Elodie Choquet; Eugene Serabyn; Olivier Guyon

doi:10.1117/12.2231244

4 August 2016 PSF calibration using the Lyot-based low order wavefront sensor telemetry: first simulations

Garima Singh, Julien Lozi, Elodie Choquet, Eugene Serabyn, Olivier Guyon

Proceedings Volume 9909, Adaptive Optics Systems V; 99097K (2016) https://doi.org/10.1117/12.2231244
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

One of the factors that drives the performance of small inner working angle (IWA) coronagraphs is the quality of the low-order wavefront calibration and control. The uncorrected residuals scatter the starlight and produce intensity fluctuations, which as a result creates dynamic speckle noise in the focal plane. To improve post processing of the science images, the low-order telemetry of the residuals left uncorrected by the control loop can be used to calibrate the amount of starlight leakage at small angular separations. In this proceeding, we present the preliminary simulations of point spread function calibration using the Lyot-based low-order wavefront sensor measurements (tip-tilt errors only) for a vector vortex coronagraph.

Citation Download Citation

Garima Singh, Julien Lozi, Elodie Choquet, Eugene Serabyn, and Olivier Guyon "PSF calibration using the Lyot-based low order wavefront sensor telemetry: first simulations", Proc. SPIE 9909, Adaptive Optics Systems V, 99097K (4 August 2016); https://doi.org/10.1117/12.2231244

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