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Journal of Astronomical Telescopes, Instruments, and Systems

Achromatic interfero-coronagraph with variable rotational shear: reducing of star leakage effect, white light nulling with lab prototype
Author(s): Pavel Frolov; Inna Shashkova; Yuliya Bezymyannikova; Alexander Kiselev; Alexander Tavrov
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Paper Abstract

Stellar coronagraphs with a small inner working angle have limited possibilities to detect exoplanets due to the star leakage effect caused by incomplete suppression of the star of finite angular size. We consider an improved instrument for direct imaging of exoplanets: common-path achromatic interfero-coronagraph with variable rotational shear (CP-ARC). CP-ARC reduces the star leakage effect by several orders of magnitude (with small angles of rotational shear relative to a fixed angle of 180 deg) with telescope size more than 1 m. Operation capacity of CP-ARC was experimentally verified by laser light nulling and white light nulling with lab prototype treated.

Paper Details

Date Published: 28 October 2015
PDF: 7 pages
J. Astron. Telesc. Instrum. Syst. 2(1) 011002 doi: 10.1117/1.JATIS.2.1.011002
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 2, Issue 1
Show Author Affiliations
Pavel Frolov, Space Research Institute (Russia)
Inna Shashkova, Space Research Institute (Russia)
Moscow Power Engineering Institute (Russia)
Yuliya Bezymyannikova, Space Research Institute (Russian Federation)
Moscow Institute of Physics and Technology (Russian Federation)
Alexander Kiselev, Space Research Institute (Russia)
Alexander Tavrov, Space Research Institute (Russia)

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