21 August 1998 Design of the Gemini near-infrared spectrometer
Author Affiliations +
Abstract
The design of a near-IR spectrometer for the Gemini 8m telescopes is described. This instrument, GNIRS, provides coverage from 0.9 to 5.5 micrometers at several spectral resolutions and two pixel scales. Capabilities include an imaging mode intended primarily for acquisition, a cross- dispersed mode covering wavelengths from 0.9 to 2.5 micrometers , and provisions for an integral field unit. The design of the GNIRS is conservative, as it must meet tight schedule and resource constraints; it nonetheless provides high throughput and operational efficiency, minimal flexure, and the flexibility needed to support queue observing. The optics are a combination of diamond-turned metal optics for the fore-optics and collimator, and refractive optics for the cameras. The mechanism include a two-axis grating turret; all mechanism are deposited by means of internal detents. The instrument achieves low flexure within its weight budget by the use of a modular structure composed of cylindrical light-weighted sections into which individual mechanisms and optics modules are mounted. Extensive analyses of mechanical and optical performance have been performed. The GNIRS has passed its critical design review, and fabrication is now underway.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan H. Elias, Jonathan H. Elias, Daniel Vukobratovich, Daniel Vukobratovich, John R. Andrew, John R. Andrew, Myung K. Cho, Myung K. Cho, Randy W. Cuberly, Randy W. Cuberly, Ken Don, Ken Don, Allen Gerzoff, Allen Gerzoff, Charles F. W. Harmer, Charles F. W. Harmer, D. Harris, D. Harris, Julie B. Heynssens, Julie B. Heynssens, J. Hicks, J. Hicks, A. Kovacs, A. Kovacs, Cheng Li, Cheng Li, M. Liang, M. Liang, Il-Kwon Moon, Il-Kwon Moon, Earl T. Pearson, Earl T. Pearson, G. Plum, G. Plum, Nicolas A. Roddier, Nicolas A. Roddier, Janet E. Tvedt, Janet E. Tvedt, Richard J. Wolff, Richard J. Wolff, Woon-Yin Wong, Woon-Yin Wong, } "Design of the Gemini near-infrared spectrometer", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317281; https://doi.org/10.1117/12.317281
PROCEEDINGS
11 PAGES


SHARE
RELATED CONTENT

CHOUGH: current status and future plans
Proceedings of SPIE (July 29 2018)
Gemini near-infrared imager (NIRI)
Proceedings of SPIE (August 15 2000)
Low-resolution imaging spectroscopy with SOFIA
Proceedings of SPIE (August 20 1998)
Imaging Fourier transform spectrometer for NGST
Proceedings of SPIE (July 27 2000)
Gemini instrument program
Proceedings of SPIE (August 15 2000)

Back to Top