IRIS: a high-resolution midinfrared spectrometer for the upgraded 6.5-meter Multiple Mirror Telescope

Eric E. Bloemhof; George H. Rieke

doi:10.1117/12.219527

15 September 1995 IRIS: a high-resolution midinfrared spectrometer for the upgraded 6.5-meter Multiple Mirror Telescope

Eric E. Bloemhof, George H. Rieke

Author Affiliations +

Proceedings Volume 2540, Current Developments in Optical Design and Engineering V; (1995) https://doi.org/10.1117/12.219527
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

In mid-1996, the Multiple Mirror Telescope (MMT) will be upgraded from its current configuration of six 1.8-meter primary mirrors to house a single 6.5-meter primary. To exploit the dramatic increase in collecting area and spatial resolution, as well as the high infrared quality of the observing site, we have designed a new spectrometer that will cover the thermal infrared (4 to 25 micrometer) at high spectral and spatial resolution. The design is based on the new generation of Si:As BIB detectors with 256 by 256 formats, which represent a substantial advance in array size at these wavelengths. The design consists entirely of reflecting optics, and is arranged to deliver diffraction-limited resolution longwards of 8 micrometers. A maximum spectral resolving power of R equals 15,000 is provided by an echelle grating. A lower resolution grating or a plane mirror for two-dimensional imaging may be substituted for the echelle.

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Eric E. Bloemhof and George H. Rieke "IRIS: a high-resolution midinfrared spectrometer for the upgraded 6.5-meter Multiple Mirror Telescope", Proc. SPIE 2540, Current Developments in Optical Design and Engineering V, (15 September 1995); https://doi.org/10.1117/12.219527

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