Optical modeling for the evaluation of HOWFSC on embedded processors

Kian Milani; Ewan Douglas; Leonid Pogorelyuk; Kerri Cahoy; Nicholas Belsten; Brandon Eickert; Christopher Mendillo; Shanti Rao

doi:10.1117/12.3019056

29 August 2024 Optical modeling for the evaluation of HOWFSC on embedded processors

Kian Milani, Ewan Douglas, Leonid Pogorelyuk, Kerri Cahoy, Nicholas Belsten, Brandon Eickert, Christopher Mendillo, Shanti Rao

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130976B (2024) https://doi.org/10.1117/12.3019056
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The correction of quasi-static wavefront errors within a coronagraphic optical system will be a key challenge to overcome in order to directly image exoplanets in reflected light. These quasi-static errors are caused by mid to high-order surface errors on the optical elements as a result of manufacturing processes. Using high-order wavefront sensing and control (HOWFSC) techniques that do not introduce non-common path aberrations, the quasi-static errors can be corrected within the desired region of interest designated as the dark hole. For the future Habitable Worlds Observatory (HWO), HOWFSC algorithms will be key to attaining the desired contrasts. To simulate the performance of HOWFSC with space rated processors, optical models for a 6 m class space-borne observatory and a coronagraph have been developed. Phenomena such as the Talbot effect and beamwalk are included in the simulations using combinations of ray-based modeling and end-to-end propagation techniques. After integrating the optical models with the embedded processors, simulations with realistic computation times can be performed to understand the computational hardware performance that will be needed to maintain the desired contrasts. Here, the details of the optical models are presented along with the HOWFSC methods utilized. Initial results of the HOWFSC methods are also included as a demonstration of how system drifts will degrade the contrast and require dark hole maintenance.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kian Milani, Ewan Douglas, Leonid Pogorelyuk, Kerri Cahoy, Nicholas Belsten, Brandon Eickert, Christopher Mendillo, and Shanti Rao "Optical modeling for the evaluation of HOWFSC on embedded processors", Proc. SPIE 13097, Adaptive Optics Systems IX, 130976B (29 August 2024); https://doi.org/10.1117/12.3019056

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