Michelle, mid-infrared spectrometer and imager

Ian R. Bryson; Alistair C. H. Glasse; Eli Ettedgui-Atad

doi:10.1117/12.176718

1 June 1994 Michelle, mid-infrared spectrometer and imager

Ian R. Bryson, Alistair C. H. Glasse, Eli Ettedgui-Atad

Proceedings Volume 2198, Instrumentation in Astronomy VIII; (1994) https://doi.org/10.1117/12.176718
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

Michelle is a facility-class long-slit spectrometer for the mid- IR being built at the Royal Observatory Edinburgh for the UK Infrared Telescope (UKIRT). With diamond turned, all-reflective optics to achieve high throughput and a cryogenic mechanism to select one from five diffraction gratings during operation, it will be capable of taking spectra at resolving powers ranging from 100 to 30,000 over wavelengths from 8 to 25 micrometers . A separate optical path will provide the ability to switch in well under a minute from spectroscopy to taking fully sampled diffraction limited images of the same field. Two mechanical coolers will maintain its optics at below 25K, while a Joule- Thomson (JT) stage on one of the coolers will keep the Si:As hybrid detector array at less than 10K. We present the predicted performance of the instrument, along with its opto-mechanical layout and the means by which it can be easily converted for use on the proposed Gemini telescope. The design of some unusual mechanisms is discussed.

Citation Download Citation

Ian R. Bryson, Alistair C. H. Glasse, and Eli Ettedgui-Atad "Michelle, mid-infrared spectrometer and imager", Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); https://doi.org/10.1117/12.176718

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