Optical tests of the Si immersed grating demonstrator for METIS

Tibor Agócs; Ramon Navarro; Lars Venema; Aaldert H. van Amerongen; Ruud W. M. Hoogeveen; Tonny Coppens; Govert Nieuwland; Michiel Rodenhuis; Bernhard R. Brandl; Ramon Vink

doi:10.1117/12.2234686

22 July 2016 Optical tests of the Si immersed grating demonstrator for METIS

Tibor Agócs, Ramon Navarro, Lars Venema, Aaldert H. van Amerongen, Ruud W. M. Hoogeveen, Tonny Coppens, Govert Nieuwland, Michiel Rodenhuis, Bernhard R. Brandl, Ramon Vink

Author Affiliations +

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 991215 (2016) https://doi.org/10.1117/12.2234686
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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 learnt during the immersed grating demonstrator test campaign that helped us to improve the fabrication processes of the grating patterning on the wafer.

Citation Download Citation

Tibor Agócs, Ramon Navarro, Lars Venema, Aaldert H. van Amerongen, Ruud W. M. Hoogeveen, Tonny Coppens, Govert Nieuwland, Michiel Rodenhuis, Bernhard R. Brandl, and Ramon Vink "Optical tests of the Si immersed grating demonstrator for METIS", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991215 (22 July 2016); https://doi.org/10.1117/12.2234686

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available