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Proceedings Paper • Open Access

All-dielectric prism-grating-prism component realized by direct hydrophilic bonding technology for optical applications in space
Author(s): Thomas Flügel-Paul; Carolin Rothhardt; Tino Benkenstein; Kevin Grabowski; Stefan Risse; Ramona Eberhardt; Benedikt Guldimann; Uwe D. Zeitner

Paper Abstract

Here, we report on the approach of realizing an all-fused-silica PGP disperser (prism + grating + prism) by low temperature direct bonding. A surface relief grating with period 660nm and overall depth of approximately 2000nm is sandwiched between two equal prisms. Direct bonding of glass relies on the formation of covalent bonds between hydrophilic silicon-oxide surfaces. Compared to other joining technologies, like adhesive bonding or optical contacting, the established connection is stiff, shows no outgassing, is highly resistant against chemical and radiative degradation and the established optical interface is intrinsically impedance-matched. In summary, two prototypes were realized, optically characterized and successfully underwent environmental testing. The overall diffraction efficiency of the PGP is larger than 90%.

Paper Details

Date Published: 12 July 2019
PDF: 10 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118014 (12 July 2019); doi: 10.1117/12.2535959
Show Author Affiliations
Thomas Flügel-Paul, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Carolin Rothhardt, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Tino Benkenstein, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Kevin Grabowski, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Stefan Risse, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Ramona Eberhardt, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Benedikt Guldimann, European Space Agency (Netherlands)
Uwe D. Zeitner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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