Print Email Facebook Twitter Development and optical performance tests of the Si immersed grating demonstrator for E-ELT METIS Title Development and optical performance tests of the Si immersed grating demonstrator for E-ELT METIS Author Navarro, R. (Netherlands Institute for Radio Astronomy (ASTRON)) Agócs, Tibor (Netherlands Institute for Radio Astronomy (ASTRON)) Venema, L (Netherlands Institute for Radio Astronomy (ASTRON)) van Amerongen, A.H. (SRON Netherlands Institute for Space Research) Rodenhuis, M. (Universiteit Leiden) Hoogeveen, Ruud W. M. (SRON Netherlands Institute for Space Research) Coppens, T (SRON Netherlands Institute for Space Research) Brandl, B.R. (TU Delft Astrodynamics & Space Missions; SRON Netherlands Institute for Space Research) Vink, R. (European Space Agency (ESA)) Contributor Cugny, B. (editor) Karafolas, N. (editor) , Z. Sodnik (editor) Date 2017 Abstract Immersed gratings offer several advantages over conventional gratings: more compact spectrograph designs, and by using standard semiconductor industry techniques, higher diffraction-efficiency and lower stray-light can be achieved. We present the optical tests of the silicon immersed grating demonstrator for the Mid-infrared E-ELT Imager and Spectrograph, METIS. We detail the interferometric tests that were done to measure the wavefront-error and present the results of the throughput and stray-light measurements. We also elaborate on the challenges encountered and lessons learned during the immersed grating demonstrator test campaign that helped us to improve the fabrication processes of the grating patterning on the wafer. To reference this document use: http://resolver.tudelft.nl/uuid:3883b86f-b961-419b-b0f4-58c5ffbb6c59 DOI https://doi.org/10.1117/12.2296128 Publisher SPIE Source ICSO 2016, International Conference on Space Optics: Biarritz, France, 18–21 October 2016, 10562 Event International Conference on Space Optics, 2016-10-18 → 2016-10-21, Biarritz, France Series Proceedings of SPIE, 10562 Part of collection Institutional Repository Document type conference paper Rights © 2017 R. Navarro, Tibor Agócs, L Venema, A.H. van Amerongen, M. Rodenhuis, Ruud W. M. Hoogeveen, T Coppens, B.R. Brandl, R. Vink Files PDF 1056257.pdf 1.12 MB Close viewer /islandora/object/uuid:3883b86f-b961-419b-b0f4-58c5ffbb6c59/datastream/OBJ/view