A microlens-array based pupil slicer and double scrambler for MAROON-X

Andreas Seifahrt; Julian Stürmer; Jacob L. Bean

doi:10.1117/12.2232118

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22 July 2016 A microlens-array based pupil slicer and double scrambler for MAROON-X

Andreas Seifahrt, Julian Stürmer, Jacob L. Bean

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Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99121P (2016) https://doi.org/10.1117/12.2232118
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We report on the design and construction of a microlens-array (MLA)-based pupil slicer and double scrambler for MAROON-X, a new fiber-fed, red-optical, high-precision radial-velocity spectrograph for one of the twin 6.5m Magellan Telescopes in Chile. We have constructed a 3X slicer based on a single cylindrical MLA and show that geometric efficiencies of ≥85% can be achieved, limited by the fill factor and optical surface quality of the MLA. We present here the final design of the 3x pupil slicer and double scrambler for MAROON-X, based on a dual MLA design with (a)spherical lenslets. We also discuss the techniques used to create a pseudo-slit of rectangular core fibers with low FRD levels.

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Andreas Seifahrt, Julian Stürmer, and Jacob L. Bean "A microlens-array based pupil slicer and double scrambler for MAROON-X", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99121P (22 July 2016); https://doi.org/10.1117/12.2232118

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