Dark zone maintenance results for segmented aperture wavefront error drift in a high contrast space coronagraph

Susan F. Redmond; Laurent Pueyo; Leonid Pogorelyuk; Emiel Por; James Noss; Iva Laginja; Keira Brooks; Marshall Perrin; Rémi Soummer; Jeremy Kasdin

doi:10.1117/12.2594647

1 September 2021 Dark zone maintenance results for segmented aperture wavefront error drift in a high contrast space coronagraph

Susan F. Redmond, Laurent Pueyo, Leonid Pogorelyuk, Emiel Por, James Noss, Iva Laginja, Keira Brooks, Marshall Perrin, Rémi Soummer, Jeremy Kasdin

Author Affiliations +

Proceedings Volume 11823, Techniques and Instrumentation for Detection of Exoplanets X; 118231K (2021) https://doi.org/10.1117/12.2594647
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

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

Citation Download Citation

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

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available