9 August 2016 Preliminary optical design for the common fore optics of METIS
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Abstract
METIS is the Mid-infrared E-ELT Imager and Spectrograph, which will provide outstanding observing capabilities, focusing on high angular and spectral resolution. It consists of two diffraction-limited imagers operating in the LM and NQ bands respectively and an IFU fed diffraction-limited high-resolution (R=100,000) LM band spectrograph. These science subsystems are preceded by the common fore optics (CFO), which provides the following essential functionalities: calibration, chopping, image de-rotation, thermal background and stray light reduction. We show the evolution of the CFO optical design from the conceptual design to the preliminary optical design, detail the optimization steps and discuss the necessary trade-offs.
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Tibor Agócs, Tibor Agócs, Bernhard R. Brandl, Bernhard R. Brandl, Rieks Jager, Rieks Jager, Felix Bettonvil, Felix Bettonvil, Gabby Aitink-Kroes, Gabby Aitink-Kroes, Lars Venema, Lars Venema, Matthew Kenworthy, Matthew Kenworthy, Olivier Absil, Olivier Absil, Thomas Bertram, Thomas Bertram, "Preliminary optical design for the common fore optics of METIS", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99089Q (9 August 2016); doi: 10.1117/12.2232512; https://doi.org/10.1117/12.2232512
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