Title
A set of innovative immersed grating based spectrometer designs for METIS
Author
Agócs, T.
Navarro, R.
Venema, L.
van Amerongen, A.H.
Tol, P.J.J.
van Brug, H.
Brandl, B.R.
Molster, F.
Todd, S.
Contributor
Cunningham, C.R. (editor)
Navarro, R. (editor)
Barto, A.A. (editor)
Publication year
2014
Abstract
We present innovative, immersed grating based optical designs for the SMO (Spectrograph Main Optics) module of the Mid-infrared E-ELT Imager and Spectrograph, METIS. The immersed grating allows a significant reduction of SMO volume compared to conventional echelle grating designs, because the diffraction takes place in high refractive index silicon. Additionally, using novel optimization techniques and technical solutions in silicon micromachining offered by the semiconductor industry, further improvements can be achieved. We show optical architectures based on compact, double-pass Three Mirror Anastigmat (TMA) designs, which appear advantageous in terms of one or several of the following: optical performance, reduction of volume, ease of manufacturing and testing. We explore optical designs, where the emphasis is put on manufacturability and we investigate optical solutions, where the ultimate goal is the highest possible optical performance. These novel, silicon immersed grating based design concepts are applicable for future earth and space based spectrometers.
Subject
Physics & Electronics
OPT - Optics
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
Astronomy
E-ELT
Immersed grating
METIS
Mid-infrared
Diffraction gratings
Infrared devices
Optical design
Optical testing
Refractive index
Semiconducting silicon
Semiconductor device manufacture
Spectrographs
Spectrometers
Telescopes
Optimization techniques
Semiconductor industry
Silicon micromachining
Three mirror anastigmats
To reference this document use:
http://resolver.tudelft.nl/uuid:e723f1b4-ba21-44c7-8955-ebeea73805eb
TNO identifier
523215
Publisher
SPIE
ISBN
9780819496195
ISSN
0277-786X
Article number
91511L
Document type
conference paper