9 August 2016 Preliminary optical design for the common fore optics of METIS
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tibor Agócs, Bernhard R. Brandl, Rieks Jager, Felix Bettonvil, Gabby Aitink-Kroes, Lars Venema, Matthew Kenworthy, Olivier Absil, 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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