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Proceedings Paper • Open Access

Overview on grating developments at ESA
Author(s): B. Guldimann; A. Deep; R. Vink; B. Harnisch; S. Kraft; B. Sierk; G. Bazalgette; J.-L. Bézy

Paper Abstract

In the frame of recent studies and missions, ESA has been performing various pre-developments of optical gratings for instruments operating at wavelengths from the UV up to the SWIR. The instrument requirements of Sentinel-4, Sentinel-5, CarbonSat and FLEX are driving the need for advanced designs and technologies leading to gratings with high efficiency, high spectral resolution, low stray light and low polarization sensitivities. Typical ESA instruments (e.g. Sciamachy, GOME, MERIS, OLCI, NIRSpec) were and are based on ruled gratings or gratings manufactured with one holographic photoresist mask layer which is transferred to an optical substrate (e.g. glass, glass ceramic) with dry etching methods and subsequently either coated with a reflective coating or used as a mold for replication. These manufacturing methods lead to blazed grating profiles with a metallic reflective surface. The vast majority of spectrometers on ground are still based on such gratings. In general, gratings based on grooved metallic surfaces tend for instance to polarize the incoming light significantly and are therefore not always suitable for ESA’s needs of today. Gratings made for space therefore evolved to many other designs and concepts which will be reported in this paper.

Paper Details

Date Published: 17 November 2017
PDF: 18 pages
Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 1056314 (17 November 2017); doi: 10.1117/12.2304094
Show Author Affiliations
B. Guldimann, ESA-ESTEC (Netherlands)
A. Deep, ESA-ESTEC (Netherlands)
R. Vink, ESA-ESTEC (Netherlands)
B. Harnisch, ESA-ESTEC (Netherlands)
S. Kraft, ESA-ESTEC (Netherlands)
B. Sierk, ESA-ESTEC (Netherlands)
G. Bazalgette, ESA-ESTEC (Netherlands)
J.-L. Bézy, ESA-ESTEC (Netherlands)

Published in SPIE Proceedings Vol. 10563:
International Conference on Space Optics — ICSO 2014
Zoran Sodnik; Bruno Cugny; Nikos Karafolas, Editor(s)

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