High-contrast wavefront sensor testbed

Mala Mateen; Michael Hart; Johanan l. Codona

doi:10.1117/12.3019249

28 August 2024 High-contrast wavefront sensor testbed

Mala Mateen, Michael Hart, Johanan l. Codona

Proceedings Volume 13097, Adaptive Optics Systems IX; 130971Q (2024) https://doi.org/10.1117/12.3019249
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

Detecting dim exoplanets close to bright stars requires highly sensitive wavefront sensors that utilize the full spatial coherence of the pupil. This allows better measurement and correction of low-order modes, which diffract starlight close to the star. We present a closed-loop demonstration with three different wavefront sensors: the Shack Hartmann (SHWFS), the three-sided Pyramid (3PWFS), and the non-linear curvature Wavefront Sensor (nlCWFS), using a new wavefront sensor testbed. All three wavefront sensors simultaneously have light on them, however they are sequentially used to close the loop, using the single deformable mirror. We want to compare the performance of the three wavefront sensors for different traget brightness and atmospheric conditions.

Conference Presentation

Citation Download Citation

Mala Mateen, Michael Hart, and Johanan l. Codona "High-contrast wavefront sensor testbed", Proc. SPIE 13097, Adaptive Optics Systems IX, 130971Q (28 August 2024); https://doi.org/10.1117/12.3019249

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