Special Section on WFIRST-AFTA Coronagraphs

Achromatic interfero-coronagraph with variable rotational shear: reducing of star leakage effect, white light nulling with lab prototype

[+] Author Affiliations
Pavel Frolov, Alexander Kiselev, Alexander Tavrov

Russian Academy of Sciences, Space Research Institute (IKI), Planetary Physics Department, 84/32 Profsoyuznaya, Moscow 117997, Russia

Inna Shashkova

Russian Academy of Sciences, Space Research Institute (IKI), Planetary Physics Department, 84/32 Profsoyuznaya, Moscow 117997, Russia

Moscow Power Engineering Institute, 14 Krasnokazarmennaya, Moscow 111250, Russia

Yuliya Bezymyannikova

Russian Academy of Sciences, Space Research Institute (IKI), Planetary Physics Department, 84/32 Profsoyuznaya, Moscow 117997, Russia

Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141700, Russia

J. Astron. Telesc. Instrum. Syst. 2(1), 011002 (Oct 28, 2015). doi:10.1117/1.JATIS.2.1.011002
History: Received March 31, 2015; Accepted September 11, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Pavel Frolov ; Inna Shashkova ; Yuliya Bezymyannikova ; Alexander Kiselev and Alexander Tavrov
"Achromatic interfero-coronagraph with variable rotational shear: reducing of star leakage effect, white light nulling with lab prototype", J. Astron. Telesc. Instrum. Syst. 2(1), 011002 (Oct 28, 2015). ; http://dx.doi.org/10.1117/1.JATIS.2.1.011002


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