23 July 2008 Small solutions to the large telescope problem: a massively replicated MEMS spectrograph
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Abstract
In traditional seeing-limited observations the spectrograph aperture scales with telescope aperture, driving sizes and costs to enormous proportions. We propose a new solution to the seeing-limited spectrograph problem. A massively fiber-sliced congfiguration feeds a set of small diffraction-limited spectrographs. We present a prototype, tunable, J-band, diffraction grating, designed specifically for Astronomical applications: The grating sits at the heart of a spectrograph, no bigger than a few inches on a side. Throughput requirements dictate using tens-of-thousands of spectrographs on a single 10 to 30 meter telescope. A full system would cost significantly less than typical instruments on 10m or 30m telescopes.
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Nicholas P. Konidaris, Joel A. Kubby, Andrew I. Sheinis, "Small solutions to the large telescope problem: a massively replicated MEMS spectrograph", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70182I (23 July 2008); doi: 10.1117/12.787012; https://doi.org/10.1117/12.787012
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