Presentation + Paper
1 September 2021 Dark zone maintenance results for segmented aperture wavefront error drift in a high contrast space coronagraph
Author Affiliations +
Abstract
Due to the limited number of photons, directly imaging planets requires long integration times with a coronagraphic instrument. The wavefront must be stable on the same time scale, which is often difficult in space due to thermal variations and other mechanical instabilities. In this paper, we discuss the implications on future space mission observing conditions of our recent laboratory demonstration of a dark hole maintenance (DHM) algorithm. The experiments are performed on the High-contrast imager for Complex Aperture Telescopes (HiCAT) at the Space Telescope Science Institute (STScI). The testbed contains a segmented aperture, a pair of deformable mirrors (DMs), and a lyot coronagraph. The segmented aperture injects high order zernike wavefront aberration drifts into the system which are then corrected by the DMs downstream via the DHM algorithm. We investigate various drift modes including segmented aperture drift, all DMs drift, and drift correction at multiple wavelengths.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Susan F. Redmond, Laurent Pueyo, Leonid Pogorelyuk, Emiel Por, James Noss, Iva Laginja, Keira Brooks, Marshall Perrin, Rémi Soummer, and Jeremy Kasdin "Dark zone maintenance results for segmented aperture wavefront error drift in a high contrast space coronagraph", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118231K (1 September 2021); https://doi.org/10.1117/12.2594647
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KEYWORDS
Coronagraphy

Wavefronts

Planets

Space telescopes

Telescopes

Point spread functions

Stars

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