Share Email Print
cover

Journal of Astronomical Telescopes, Instruments, and Systems • Open Access • new

Design of off-axis mirrors for the phase-induced amplitude apodization complex mask coronagraph
Author(s): Eugene A. Pluzhnik; Olivier Guyon; Ruslan Belikov; Eduardo A. Bendek

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 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.

Paper Details

Date Published: 8 March 2016
PDF: 8 pages
J. Ast. Inst. Sys. 2(1) 011018 doi: 10.1117/1.JATIS.2.1.011018
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 2, Issue 1
Show Author Affiliations
Eugene A. Pluzhnik, NASA Ames Research Ctr. (United States)
Olivier Guyon, The Univ. of Arizona (United States)
National Astronomical Observatory of Japan (United States)
Ruslan Belikov, NASA Ames Research Ctr. (United States)
Eduardo A. Bendek, NASA Ames Research Ctr. (United States)


© SPIE. Terms of Use
Back to Top