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

Authors :
Redmond, Susan F.
Pueyo, Laurent
Pogorelyuk, Leonid
Por, Emiel
Noss, James
Brooks, Keira
Laginja, Iva
Will, Scott D.
Perrin, Marshall D.
Soummer, Remi
Kasdin, N. Jeremy
Redmond, Susan F.
Pueyo, Laurent
Pogorelyuk, Leonid
Por, Emiel
Noss, James
Brooks, Keira
Laginja, Iva
Will, Scott D.
Perrin, Marshall D.
Soummer, Remi
Kasdin, N. Jeremy
Publication Year :
2021

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 zone maintenance (DZM) 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 continuous deformable mirrors (DMs), and a lyot coronagraph. The segmented aperture injects high order wavefront aberration drifts into the system which are then corrected by the DMs downstream via the DZM algorithm. We investigate various drift modes including segmented aperture drift, all three DMs drift simultaneously, and drift correction at multiple wavelengths.<br />Comment: Submitted to OP210 SPIE Optical Engineering + Applications, Techniques and Instrumentation for Detection of Exoplanets X | 14 pages, 5 figures

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1312087173
Document Type :
Electronic Resource