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Proceedings Paper

Polarization dOTF: on-sky focal plane wavefront sensing
Author(s): Keira J. Brooks; Laure Catala; Matthew A. Kenworthy; Steven M. Crawford; Johanan L. Codona
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Paper Abstract

The differential Optical Transfer Function (dOTF) is a focal plane wavefront sensing method that uses a diversity in the pupil plane to generate two different focal plane images. The difference of their Fourier transforms recovers the complex amplitude of the pupil down to the spatial scale of the diversity. We produce two simultaneous PSF images with diversity using a polarizing filter at the edge of the telescope pupil, and a polarization camera to simultaneously record the two images. Here we present the first on-sky demonstration of polarization dOTF at the 1.0m South African Astronomical Observatory telescope in Sutherland, and our attempt to validate it with simultaneous Shack-Hartmann wavefront sensor images.

Paper Details

Date Published: 22 July 2016
PDF: 11 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991203 (22 July 2016); doi: 10.1117/12.2232722
Show Author Affiliations
Keira J. Brooks, Space Telescope Science Institute (United States)
Laure Catala, South African Astronomical Observatory (South Africa)
Univ. of Cape Town (South Africa)
Matthew A. Kenworthy, Leiden Observatory (Netherlands)
Steven M. Crawford, South African Astronomical Observatory (South Africa)
Johanan L. Codona, Steward Observatory (United States)

Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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