Scattering from reflective diffraction gratings: the challenges of measurement and simulation

Monika Kroneberger; Sebastian Fray

doi:10.1515/aot-2017-0032

Article

Scattering from reflective diffraction gratings: the challenges of measurement and simulation

Monika Kroneberger
Monika Kroneberger received her diploma in Physics in 1991 from the Johann Wolfgang Goethe University in Frankfurt/Main. Currently, she is working in the domain of optical system engineering for OHB system AG. Her main topic is stray light reduction and verification in the optical systems by simulation and measurement.
and Sebastian Fray
Sebastian Fray did his PhD thesis at the Max-Planck-Institute of Quantum Optics in Garching and received his PhD in Physics in 2004 from the Ludwigs-Maximilians Universität in Munich/Germany. Currently, he works at OHB System AG in the domain of optical system engineering involved in development of various optical space instruments for earth observation.

Published/Copyright: September 11, 2017

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From the journal Advanced Optical Technologies Volume 6 Issue 5

Abstract

The accurate simulation of stray light is essential for the prediction of signal detection fidelity in an optical instrument with high contrast requirements. In a spectrometer, the scattering from reflective gratings is poorly understood and difficult to characterize, but contributes significantly to the overall system stray light and reduction in contrast. This paper describes the approaches that will be taken at OHB System AG to establish a sufficiently precise fitting of bidirectional scatter distribution functions (BSDFs) to existing data obtained from measurements of scattering from gratings. The work is being undertaken in preparation for the analysis and fitting of a BSDF to the scattering from the grating for the FLEX low-resolution spectrometer that will be measured in the second half of 2017.

Keywords: BSDF measurement; grating; scatter; spectrometer; stray light simulation

About the authors

Monika Kroneberger

Monika Kroneberger received her diploma in Physics in 1991 from the Johann Wolfgang Goethe University in Frankfurt/Main. Currently, she is working in the domain of optical system engineering for OHB system AG. Her main topic is stray light reduction and verification in the optical systems by simulation and measurement.

Sebastian Fray

Sebastian Fray did his PhD thesis at the Max-Planck-Institute of Quantum Optics in Garching and received his PhD in Physics in 2004 from the Ludwigs-Maximilians Universität in Munich/Germany. Currently, he works at OHB System AG in the domain of optical system engineering involved in development of various optical space instruments for earth observation.

Acknowledgments

In the frame of FLEX development, OHB-Munich has run analyses on the FLEX LR assembly to investigate stray light from different sources. Results of this paper are partially based on this work that was funded by ESA through the FLEX Mission development program.

References

[1] S. J. Wein, PhD Theses University of Arizona (1989), ‘Small-Angle Scatter Measurement’.Search in Google Scholar

[2] B. Harnisch, A. Deep, R. Vink, C. Coatantiec, ICSO 2012, FP 156, ‘Grating Scattering BSDF and Imaging Performances’.Search in Google Scholar

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Received: 2017-4-17

Accepted: 2017-8-8

Published Online: 2017-9-11

Published in Print: 2017-10-26

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Articles in the same Issue

https://doi.org/10.1515/aot-2017-0032

Keywords for this article

BSDF measurement; grating; scatter; spectrometer; stray light simulation