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Proceedings Paper • Open Access

Conceptual approaches to the study of efficient bandpass filter design for ultraviolet spaceborne instruments
Author(s): U. Brauneck; A. Hull; R. Woodruff; J. Sanchez; D. Apitz; T. Westerhoff

Paper Abstract

In support of a spaceborne astrophysics instrument design, we have studied high UV filter efficiency and strong transmission blocking out to the end of Si response at 1100nm. For filters at wavelengths 297.5nm/338.5nm/379.5nm, these attributes are achieved with the combination of hard sputtered dielectric coatings on colored glass substrates. The filterglass substrates can be used to suppress ghost images caused by reflection at the exit face which is a common problem of all interference filter designs. Known disadvantages of filterglasses like solarization or autofluorescence are discussed and possible ways to mitigate are discussed. At two shorter wavelengths, 215.5nm and 256.5nm, metaldielectric Fabry-Perot stacks are applied on fused silica. Those traditional designs are advantageous due to their efficient blocking up to the mid IR range and economic low number of layers. We discuss the different design possibilities of metal-dielectric filters and ways to improve the steepness of the slopes. Resulting spectra are expressed.

Paper Details

Date Published: 12 July 2019
PDF: 10 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111804K (12 July 2019); doi: 10.1117/12.2536083
Show Author Affiliations
U. Brauneck, SCHOTT Suisse SA (Switzerland)
A. Hull, Kendrick Aerospace Consulting LLC (United States)
Univ. of New Mexico (United States)
R. Woodruff, Woodruff Consulting (United States)
J. Sanchez, SCHOTT Suisse SA (Switzerland)
D. Apitz, SCHOTT Suisse SA (Switzerland)
T. Westerhoff, SCHOTT AG (Germany)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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