Share Email Print

Proceedings Paper

Preliminary optical design for the Flamingos-2 near-infrared multi-silt spectrograph and imager for Gemini-South
Author(s): Harland W. Epps; Richard Elston
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The University of Florida previously designed and implemented a fully-cryogenic near-infrared multi-object (slit) spectrograph and imager called Flamingos which has been used successfully at the f/8.0 Cassegrain focus of the Kitt Peak 4.0-m telescope and elsewhere. Current plans are under way to design an to build a similar but larger, more efficient follow-on near-infrared instrument to be used at the f/16.0 focus of the 8.0-m Gemini-South telescope. The new design is called Flamingos-2. It will accommodate the (1.00 to 2.40)-micron wavelength range for grism-driven spectroscopy and it will provide direct imaging in the customary J-, H- and K-band(s). It will feature a 100.0-mm diameter collimated beam and it will reimage at 100.0 microns/arcsec upon a flat RSC Hawaii-2 (2048 by 2048 by 18-micron) array. We have designed preliminary all-refracting, all-spherical cryogenic optics for Flamingos-2. Near-infrared optical material alternatives are discussed. The importance of using low-index materials is emphasized. Our 6-element collimator contains only one high-index (ZnSe) element. Our 6-element camera contains no high-index element. It uses a medium-index near-infrared transmitting optical glass which provides excellent color correction. We present these fully-quantitative preliminary optical designs for Flamingos-2 together with our anlaysis of its expected performance for spectroscopy and for direct-imaging applications.

Paper Details

Date Published: 7 March 2003
PDF: 15 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.461437
Show Author Affiliations
Harland W. Epps, UCO/Lick Observatory (United States)
Richard Elston, Univ. of Florida (United States)

Published in SPIE Proceedings Vol. 4841:
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes
Masanori Iye; Alan F. M. Moorwood, Editor(s)

© SPIE. Terms of Use
Back to Top