Design of off-axis mirrors for the phase-induced amplitude apodization complex mask coronagraph

Eugene Pluzhnik; Olivier Guyon; Ruslan Belikov; Eduardo Bendek

doi:10.1117/1.JATIS.2.1.011018

Design of off-axis mirrors for the phase-induced amplitude apodization complex mask coronagraph

Eugene Pluzhnik, Olivier Guyon, Ruslan Belikov, Eduardo Bendek

Optical Sciences

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The phase-induced amplitude apodization complex mask coronagraph (PIAACMC) provides an efficient way to control diffraction propagation effects caused by the central obstruction/segmented mirrors of the telescope. PIAACMC can be optimized in a way that takes into account both chromatic diffraction effects caused by the telescope obstructed aperture and the tip-tilt sensitivity of the coronagraph. As a result, unlike classic phase-induced amplitude apodization (PIAA), the PIAACMC mirror shapes are often slightly asymmetric even for an on-axis configuration and require more care in calculating off-axis shapes when an off-axis configuration is preferred. A method to design off-axis PIAA mirror shapes given an on-axis mirror design is presented. The algorithm is based on geometrical ray tracing and is able to calculate off-axis PIAA mirror shapes for an arbitrary geometry of the input and output beams. The method is demonstrated using the third generation PIAACMC design for WFIRST-AFTA telescope. Geometrical optics design issues related to the off-axis diffraction propagation effects are also discussed.

Original language	English (US)
Article number	011018
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	2
Issue number	1
DOIs	https://doi.org/10.1117/1.JATIS.2.1.011018
State	Published - Jan 1 2016

Keywords

Exoplanets
coronagraphy
optical design
phase-induced amplitude apodization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Control and Systems Engineering
Instrumentation
Astronomy and Astrophysics
Mechanical Engineering
Space and Planetary Science

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10.1117/1.JATIS.2.1.011018

Cite this

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title = "Design of off-axis mirrors for the phase-induced amplitude apodization complex mask coronagraph",

abstract = "The phase-induced amplitude apodization complex mask coronagraph (PIAACMC) provides an efficient way to control diffraction propagation effects caused by the central obstruction/segmented mirrors of the telescope. PIAACMC can be optimized in a way that takes into account both chromatic diffraction effects caused by the telescope obstructed aperture and the tip-tilt sensitivity of the coronagraph. As a result, unlike classic phase-induced amplitude apodization (PIAA), the PIAACMC mirror shapes are often slightly asymmetric even for an on-axis configuration and require more care in calculating off-axis shapes when an off-axis configuration is preferred. A method to design off-axis PIAA mirror shapes given an on-axis mirror design is presented. The algorithm is based on geometrical ray tracing and is able to calculate off-axis PIAA mirror shapes for an arbitrary geometry of the input and output beams. The method is demonstrated using the third generation PIAACMC design for WFIRST-AFTA telescope. Geometrical optics design issues related to the off-axis diffraction propagation effects are also discussed.",

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AU - Belikov, Ruslan

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N1 - Publisher Copyright: © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The phase-induced amplitude apodization complex mask coronagraph (PIAACMC) provides an efficient way to control diffraction propagation effects caused by the central obstruction/segmented mirrors of the telescope. PIAACMC can be optimized in a way that takes into account both chromatic diffraction effects caused by the telescope obstructed aperture and the tip-tilt sensitivity of the coronagraph. As a result, unlike classic phase-induced amplitude apodization (PIAA), the PIAACMC mirror shapes are often slightly asymmetric even for an on-axis configuration and require more care in calculating off-axis shapes when an off-axis configuration is preferred. A method to design off-axis PIAA mirror shapes given an on-axis mirror design is presented. The algorithm is based on geometrical ray tracing and is able to calculate off-axis PIAA mirror shapes for an arbitrary geometry of the input and output beams. The method is demonstrated using the third generation PIAACMC design for WFIRST-AFTA telescope. Geometrical optics design issues related to the off-axis diffraction propagation effects are also discussed.

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Design of off-axis mirrors for the phase-induced amplitude apodization complex mask coronagraph

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Keywords

ASJC Scopus subject areas

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