TY - JOUR
T1 - Compact high-resolution JR spectrometer for the Columbus Telescope
AU - Williams, D. M.
AU - Thompson, C. L.
AU - Rieke, G. H.
AU - Montgomery, E. F.
N1 - Funding Information:
We thank the Steward Observatory machinists and particularly Ivan Lanum for making the spectrometer parts. Erick Young assisted us in the experiments on etching silicon; Chad Engelbracht analyzed the flexure data. We thank the NTCMOS project for making the infrared array available to us. We appreciate the assistance of the Steward Observatory graduate students as a whole in naming the instrument This work was in part funded by the National Science Foundation under grant AST-87 15236.
Publisher Copyright:
© 1993 SPIE. All rights reserved.
PY - 1993/10/20
Y1 - 1993/10/20
N2 - 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.
AB - 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.
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U2 - 10.1117/12.158700
DO - 10.1117/12.158700
M3 - Conference article
AN - SCOPUS:85075918226
VL - 1946
SP - 482
EP - 489
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
SN - 0277-786X
T2 - Infrared Detectors and Instrumentation 1993
Y2 - 11 April 1993 through 16 April 1993
ER -