Share Email Print
cover

Proceedings Paper

New grating concepts in the NIR and SWIR spectral band for high resolution earth-observation spectrometers
Author(s): T. Flügel-Paul; G. Kalkowski; T. Benkenstein; T. Harzendorf; A. Matthes; U. D. Zeitner
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We report about our latest achievements to realize the diffraction gratings during the development activities for a future Earth observation high resolution spectrometer studied by ESA. The gratings are manufactured by electron beam lithography on fused silica substrates. The optical performance is considerably increased by applying a dedicated high refractive index coating to the grating structure using atomic layer deposition (ALD). Thus, we were able to achieve diffraction efficiencies larger than 75% averaged over both linear polarizations states, i.e. TE and TM. At the same time, the polarization sensitivity is well below 10% in both cases. Finally, the diffraction gratings for the SWIR-1 spectral channel were bonded on a massive prism substrate in order to realize a GRISM element. This process was achieved by direct fused silica bonding performed under atmospheric pressure within special mechanical equipment designed and constructed particularly for this purpose.

Paper Details

Date Published: 22 July 2016
PDF: 7 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99122A (22 July 2016); doi: 10.1117/12.2232538
Show Author Affiliations
T. Flügel-Paul, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
G. Kalkowski, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
T. Benkenstein, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
T. Harzendorf, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
A. Matthes, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
U. D. Zeitner, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

© SPIE. Terms of Use
Back to Top