Compact high-resolution JR spectrometer for the Columbus Telescope

D. M. Williams, C. L. Thompson, G. H. Rieke, E. F. Montgomery

Research output: Contribution to journalConference articlepeer-review

38 Scopus citations


An infrared, cryogenically-cooled, grating spectrometer has been designed for the Columbus Project (2 X 8.4-m telescopes) and MMT Conversion (6.5-rn). On one barrel of the Columbus Telescope and using a NICMOS3 array of 256 X 256 4Opm HgCdTe detectors, the instrument will project eh pixel to 0.33 arcsec. With a slit of 0.66 arcsec width (2 pixels), the available spectral resolutions will range from λ/Δλ = 670 to 19,000. The optics are hromatic from 1.4 to 5pm, allowing use of a variety of array types. The first version of this instnirnent has been built and fitted with optics that allow its use with the Steward Observatory 1.5-rn and 2.3-rn telescopes. It is relatively inexpensive (< $400K) and compact (~ 0.3 m3). The high spectral resolution in such a compact instrument will be achieved through an echelle grating irnmersed in silicon. We discuss the processing for producing such gratings, including demonstrations that we have conducted on test blanks. We report on the preliminary performance of the prototype instrument and on unique design features that may be useful for other spectrometers.

Original languageEnglish (US)
Pages (from-to)482-489
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Oct 20 1993
EventInfrared Detectors and Instrumentation 1993 - Orlando, United States
Duration: Apr 11 1993Apr 16 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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