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PIAA coronagraph for Origins Space telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC) instrument
Author(s): N. Fujishiro; I. Sakon; K. Enya; O. Guyon; J. Nishikawa; N. Murakami; T. Kotani; M. Tamura; A. Takahashi; T. L. Roellig; K. Ennico-Smith
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Paper Abstract

The Mid-infrared Imager, Spectrometer Coronagraph (MISC) instrument studied for the Origins Space Telescope (OST) Mission Concept 1 is designed to observe at mid-infrared (MIR) wavelengths ranging from 5 to 38 microns for OST. In the OST Mission Concept 1 study, MISC consists of three separate optical modules providing imaging, spectroscopy, and coronagraph capabilities. The MISC Coronagraph module (MISC COR) employs Phase-Induced Amplitude Apodization (PIAA) coronagraph (Guyon et al. 2014) in which pupil apodization is modified by reflection on mirrors and central starlight is blocked by focal plane mask and Lyot mask. The performance target of MISC COR is to achieve 10-7 contrast at 0.5” from the central star with covering wavelength of 6-38 microns using 2 optical channels. MISC COR will be a powerful tool to bring a revolutionary progress in exoplanet sciences. In this paper, we present detailed design of its optics and optomechanics, and discuss expected performances for a variety of combination of focal plane mask and Lyot mask.

Paper Details

Date Published: 10 July 2018
PDF: 10 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107065N (10 July 2018); doi: 10.1117/12.2313066
Show Author Affiliations
N. Fujishiro, Teikyo Univ. (Japan)
I. Sakon, The Univ. of Tokyo (Japan)
K. Enya, Institute of Space and Astronautical Science (Japan)
O. Guyon, Subaru Telescope, National Astronomical Observatory of Japan (United States)
J. Nishikawa, National Astronomical Observatory of Japan (Japan)
N. Murakami, Hokkaido Univ. (Japan)
T. Kotani, National Astronomical Observatory of Japan (Japan)
M. Tamura, National Astronomical Observatory of Japan (Japan)
A. Takahashi, Institute of Space and Astronautical Science (Japan)
T. L. Roellig, NASA Ames Research Ctr. (United States)
K. Ennico-Smith, NASA Ames Research Ctr. (United States)


Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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