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12 July 2019 Integration and testing of an imaging spectrometer for earth observation
Thomas Peschel, Matthias Beier, Christoph Damm, Johannes Hartung, Robert Jende, Sandra Müller, Mathias Rohde, Andreas Gebhardt, Stefan Risse, Ingo Walter, Ilse Sebastian, David Krutz
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 111800O (2019) https://doi.org/10.1117/12.2535943
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
Abstract
The DLR Earth Sensing Imaging Spectrometer (DESIS) is a space-based hyperspectral instrument developed by Deutsches Zentrum für Luft- und Raumfahrt (DLR). The optical system of the spectrometer was fabricated and prealigned by the Fraunhofer-Institut für Angewandte Optik und Feinmechanik (IOF).

The paper describes the manufacturing, integration, and testing of this optical system. It was realized as an all reflective system using metal-based mirrors and a modular, so-called snap-together approach, which allows to simplify the integration of optical systems considerably. Measured r.m.s. wavefront errors of the complete system are in the range of 63 nm to 120 nm, which is compliant with the instrument’s requirements.
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Thomas Peschel, Matthias Beier, Christoph Damm, Johannes Hartung, Robert Jende, Sandra Müller, Mathias Rohde, Andreas Gebhardt, Stefan Risse, Ingo Walter, Ilse Sebastian, and David Krutz "Integration and testing of an imaging spectrometer for earth observation", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111800O (12 July 2019); https://doi.org/10.1117/12.2535943
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KEYWORDS
Mirrors
Spectroscopy
Optics manufacturing
Manufacturing
Diffraction gratings
Single point diamond turning
Wavefronts
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