Reflective lyot stop low-order wavefront control for future large space telescope coronagraphs

Christopher B. Mendillo; Jaren N. Ashcraft; Kevin Zhang Derby; Ewan S. Douglas; Daewook Kim; Jared Males

doi:10.1117/12.2677654

5 October 2023 Reflective lyot stop low-order wavefront control for future large space telescope coronagraphs

Christopher B. Mendillo, Jaren N. Ashcraft, Kevin Zhang Derby, Ewan S. Douglas, Daewook Kim, Jared Males

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126802E (2023) https://doi.org/10.1117/12.2677654
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

Future large space telescope missions for directly imaging exoplanets with internal coronagraphs will require picometer level low-order wavefront control to reach the 1e-10 starlight suppression required to detect terrestrial exoplanets. This paper aims to characterize the reflective Lyot-stop Low-Order Wavefront Sensor (LLOWFS) for the application where a transmissive focal plane mask is used, such as the Vector Vortex Coronagraph (VVC). This paper first defines the control requirements for such a mission based on the low-order tolerance of the VVC. The LLOWFS performance is then derived through optical simulation and compared to the requirements. The performance is calculated as a function of the target star brightness and aperture size and the final closed-loop stability is simulated using varying models for telescope pointing jitter and wavefront drift.

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

Citation Download Citation

Christopher B. Mendillo, Jaren N. Ashcraft, Kevin Zhang Derby, Ewan S. Douglas, Daewook Kim, and Jared Males "Reflective lyot stop low-order wavefront control for future large space telescope coronagraphs", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126802E (5 October 2023); https://doi.org/10.1117/12.2677654

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