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Proceedings Paper • Open Access

Manufacturing and optical performance of silicon immersed gratings for Sentinel-5
Author(s): Ralf Kohlhaas; Paul Tol; Ruud Schuurhof; Robert Huisman; Stephen J. C. Yates; Geert Keizer; René Wanders; Sander van Loon; Tonny Coppens; Mustafa Kaykisiz; Phillip Laubert; Peter Paul Kooijman; Aaldert van Amerongen; Luc Dubbeldam

Paper Abstract

In this article the immersed gratings for the ESA Copernicus Sentinel-5 mission are presented. The manufacturing approach is shown and the optical performance of the SWIR-3 immersed gratings as well as the results of the environmental tests are discussed. The immersed gratings show an average efficiency of 60% and a wavefront error of 200 nm rms. The total integrated scatter over the complete stray-light hemisphere excluding ghosts from internal reflections is found to be 0.2% using a conservative estimate. A method for the derivation of the wavefront error from separate surface measurements is presented and the results are compared to measurements with an experimental Shack- Hartmann setup. The immersed gratings are produced by bonding a prism to a wafer with a grating. Environmental tests and testing at operational temperatures show the suitability of this approach for complex space optical components. The article concludes with possible improvements in the optical performance of future immersed gratings.

Paper Details

Date Published: 12 July 2019
PDF: 21 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111801L (12 July 2019); doi: 10.1117/12.2535976
Show Author Affiliations
Ralf Kohlhaas, SRON Netherlands Institute for Space Research (Netherlands)
Paul Tol, SRON Netherlands Institute for Space Research (Netherlands)
Ruud Schuurhof, SRON Netherlands Institute for Space Research (Netherlands)
Robert Huisman, SRON Netherlands Institute for Space Research (Netherlands)
Stephen J. C. Yates, SRON Netherlands Institute for Space Research (Netherlands)
Geert Keizer, SRON Netherlands Institute for Space Research (Netherlands)
René Wanders, SRON Netherlands Institute for Space Research (Netherlands)
Sander van Loon, SRON Netherlands Institute for Space Research (Netherlands)
Tonny Coppens, SRON Netherlands Institute for Space Research (Netherlands)
Mustafa Kaykisiz, SRON Netherlands Institute for Space Research (Netherlands)
Phillip Laubert, SRON Netherlands Institute for Space Research (Netherlands)
Peter Paul Kooijman, SRON Netherlands Institute for Space Research (Netherlands)
Aaldert van Amerongen, SRON Netherlands Institute for Space Research (Netherlands)
Luc Dubbeldam, SRON Netherlands Institute for Space Research (Netherlands)


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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