Light scattering from diffraction gratings

International Conference on Space Optics (ICSO), pp. 92

Abstract

In this contribution we will present different methods for analyzing straylight measurements in spectrometer gratings. For this purpose two different but very common types of gratings are investigated: a binary high resolution littrow grating and a silicon-crystel echelle reflection grating. We will present several measurements and simulations on such gratings. The focus lies in particular on the difference between grating ghosts and homogeneous scattering background. It is worked out, that the homogenous background must be evaluated by the well-established concept of "angle resolved scattering". Though, it is advantegeous to use the concept of "angle resolve efficiency" for ghost analysis. Further, a simulation method is presented that allows to calculate straylight in diffraction gratings. The method is applied for ghost and background analysis and it is shown that not only the particular type of disturbance but also the grating geometry itself affects the straylight level and distribution.

Authors 8

1. Martin Heusinger

   Fraunhofer Institute for Applied Optics and Precision Engineering

   Affiliation as printed

   Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, D-07745 Jena, Germany

2. Marcus Trost

   Fraunhofer Institute for Applied Optics and Precision Engineering

   Affiliation as printed

   Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, D-07745 Jena, Germany

3. Ralf Steinkopf

   Fraunhofer Institute for Applied Optics and Precision Engineering

   Affiliation as printed

   Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, D-07745 Jena, Germany

4. Ralf Kohlhaas Aachen SRON Netherlands Institute for Space Research

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands

5. Dana Tomuta

   European Space Research and Technology Centre

   Affiliation as printed

   European Space Research and Technology Centre, Postbus 299, 2200 AG Noordwijk, The Netherlands

6. Roman Windpassinger

   European Space Research and Technology Centre

   Affiliation as printed

   European Space Research and Technology Centre, Postbus 299, 2200 AG Noordwijk, The Netherlands

7. Stefan Risse

   Fraunhofer Institute for Applied Optics and Precision Engineering

   Affiliation as printed

   Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, D-07745 Jena, Germany

8. Uwe Detlef Zeitner

   Fraunhofer Institute for Applied Optics and Precision Engineering

   Affiliation as printed

   Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Straße 7, D-07745 Jena, Germany