Analytical expression of a long exposure coronagraphic point spread function

Olivier Herscovici-Schiller; Laurent M. Mugnier; Jean-François Sauvage; Jean-Michel Le Duigou; Faustine Cantalloube

doi:10.1117/12.2234140

27 July 2016 Analytical expression of a long exposure coronagraphic point spread function

Olivier Herscovici-Schiller, Laurent M. Mugnier, Jean-François Sauvage, Jean-Michel Le Duigou, Faustine Cantalloube

Proceedings Volume 9909, Adaptive Optics Systems V; 99096N (2016) https://doi.org/10.1117/12.2234140
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The resolution of coronagraphic high contrast exoplanet imaging devices such as SPHERE is limited by quasistatic aberrations. These aberrations produce speckles that can be mistaken for planets in the image. In order to design instruments, correct quasi-static aberrations or analyze data, the expression of the point spread function of a coronagraphic telescope in the presence of residual turbulence is useful. We have derived an analytic formula for this point spread function. We explain physically its structure, we validate it by numerical simulations and we show that it is computationally efficient.

Citation Download Citation

Olivier Herscovici-Schiller, Laurent M. Mugnier, Jean-François Sauvage, Jean-Michel Le Duigou, and Faustine Cantalloube "Analytical expression of a long exposure coronagraphic point spread function", Proc. SPIE 9909, Adaptive Optics Systems V, 99096N (27 July 2016); https://doi.org/10.1117/12.2234140

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