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12 July 2023 Black aperture coating with an anti-reflective clear aperture: developed and qualified for space-based applications
S. Schwinde, P. Munzert, S. Shestaeva, R. Leitel, S. Kleinle, S. Schröder
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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127775I (2023) https://doi.org/10.1117/12.2691027
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia
Abstract
The monitoring of anthropogenic CO2 by satellites (part of Copernicus, the European Union’s Earth Observation and Monitoring program) requires a special dispersive spectrometer. As a highly efficient light dispersing element, a Prism-Grating Prism (PG-P) optical element will operate in the program, mentioned above. Anti-reflection (AR) coatings and light blocking apertures are requested to suppress optical losses, to reduce stray light and to shape the beam. Beside the AR-coatings, deposition of “black” aperture as a coating directly on the PG-P element, allows to abstain a mechanical aperture. Thereby, reduced number of elements in the optical setup and therefore reduced payload of the satellite can be achieved. For this purpose, an antireflective coating inside a clear aperture combined with a light blocking and absorbing aperture-coating outside the clear aperture was realized. The developments shown in this contribution were performed for the application wavelength of 1590 - 1675 nm.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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S. Schwinde, P. Munzert, S. Shestaeva, R. Leitel, S. Kleinle, and S. Schröder "Black aperture coating with an anti-reflective clear aperture: developed and qualified for space-based applications", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127775I (12 July 2023); https://doi.org/10.1117/12.2691027
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KEYWORDS
Coating
Prisms
Antireflective coatings
Astronomical imaging
Stray light
Optical components
Optical surfaces
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