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Proceedings Paper

Theoretical study of filter design for UV-bandpass filters for the CETUS probe mission study
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Paper Abstract

The importance of high performance interference bandpass filters in the UV is growing recently. For the CETUS project a set of bandpass filters with a clear aperture of 70 mm is required centered at the wavelengths 215.5 nm / 256.5 nm / 297.5 nm / 338.5 nm / 379.5 nm with a FWHM of 41 nm and blocked as good as possible up to 1100 nm. We present a design study based on all-dielectric hard sputtered coatings on colorglass substrates for the wavelengths 297.5 nm / 338.5 nm / 379.5 nm. The colorglass substrates where chosen to suppress ghost images by reflection on the exit face and to improve the blocking in the required range. For the wavelengths 215.5 nm and 256.5 nm a conventionally evaporated design of metal-dielectric Fabry-Perot stacks was chosen on fused silica substrates. We comment on how system requirements are leading to filter specifications and show theoretical spectra of the chosen filter designs.

Paper Details

Date Published: 6 July 2018
PDF: 9 pages
Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106993D (6 July 2018); doi: 10.1117/12.2315049
Show Author Affiliations
U. Brauneck, SCHOTT Suisse SA (Switzerland)
R. Woodruff, Woodruff Consulting (United States)
S. Heap, NASA Goddard Space Flight Ctr. (United States)
S. Kendrick, Kendrick Aerospace Consulting LLC (United States)
A. Hull, Kendrick Aerospace Consulting LLC (United States)
The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 10699:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Shouleh Nikzad; Kazuhiro Nakazawa, Editor(s)

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