Differential optical transfer function wavefront sensing and pupil calibration with the HiCAT testbed

Meiji M. Nguyen; Emiel H. Por; Ananya Sahoo; Rémi Soummer; Raphaël Pourcelot; Bryony F. Nickson; Laurent Pueyo; Marshall Perrin; Iva Laginja

doi:10.1117/12.2677756

5 October 2023 Differential optical transfer function wavefront sensing and pupil calibration with the HiCAT testbed

Meiji M. Nguyen, Emiel H. Por, Ananya Sahoo, Rémi Soummer, Raphaël Pourcelot, Bryony F. Nickson, Laurent Pueyo, Marshall Perrin, Iva Laginja

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126802H (2023) https://doi.org/10.1117/12.2677756
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

The High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed is a segmented aperture coronagraph simulator designed to be a systems level prototype demonstration for the proposed Habitable Worlds Observatory recommended by the 2020 Astronomical Decadal Survey. An important technical component of operating HiCAT is a method of measuring the Wavefront Error (WFE) on the testbed. Here we present our implementation of the differential Optical Transfer Function (dOTF) phase retrieval technique on HiCAT and the WFE calibration experiments we have developed using the technique. We use dOTF to improve the wavefront calibration map of one of HiCAT’s Deformable Mirrors (DMs) as well as to measure low-order Non-Common Path Aberrations (NCPA) between the focal and imaging planes of the coronagraph.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Meiji M. Nguyen, Emiel H. Por, Ananya Sahoo, Rémi Soummer, Raphaël Pourcelot, Bryony F. Nickson, Laurent Pueyo, Marshall Perrin, and Iva Laginja "Differential optical transfer function wavefront sensing and pupil calibration with the HiCAT testbed", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126802H (5 October 2023); https://doi.org/10.1117/12.2677756

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