Michelle, mid-infrared spectrometer and imager

Details Michelle, mid-infrared spectrometer and imager Michelle, mid-infrared spectrometer and imager

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2198..715b&link_type=abstract

Proc. SPIE Vol. 2198, p. 715-724, Instrumentation in Astronomy VIII, David L. Crawford; Eric R. Craine; Eds.

Astronomy and Astrophysics

Astronomy

2

Scientific paper

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.

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