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

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.

preprint2016arXivOpen access
Andreas SeifahrtJulian StürmerJacob L. Bean
astro-ph.IMastro-ph.EP
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Andreas SeifahrtJulian StürmerJacob L. Bean

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