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Proceedings Paper

Design of off-axis PIAACMC mirrors
Author(s): Eugene Pluzhnik; Olivier Guyon; Ruslan Belikov; Eduardo Bendek
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Paper 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 tip/tilt sensitivity of the coronagraph. As a result, unlike classic 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.

Paper Details

Date Published: 16 September 2015
PDF: 10 pages
Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 960522 (16 September 2015); doi: 10.1117/12.2188602
Show Author Affiliations
Eugene Pluzhnik, NASA Ames Research Ctr. (United States)
Olivier Guyon, The Univ. of Arizona (United States)
Ruslan Belikov, NASA Ames Research Ctr. (United States)
Eduardo Bendek, NASA Ames Research Ctr. (United States)


Published in SPIE Proceedings Vol. 9605:
Techniques and Instrumentation for Detection of Exoplanets VII
Stuart Shaklan, Editor(s)

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