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An Optical Design for an Antarctic 2m Telescope with a Near IR Imager
Gillingham, P. R.
AA(Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia )
Publications of the Astronomical Society of Australia, Volume 19, Issue 3, pp. 301-305. (PASA Homepage)
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Astronomy Keywords:
telescopes, infrared: general, instrumentation: photometers, methods: observational
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A study has been made of the optical performance to be expected from an Antarctic Ritchey Chrétien telescope with a 2m diameter primary mirror imaging directly onto a detector array in the K and L infrared windows. Near diffraction limited performance is provided across a flat 30arcmin diameter field by compensating the astigmatism and field curvature with a meniscus lens which also serves as the Dewar window. With baffling inside and Narcissus mirrors outside the Dewar, extraneous radiation can be kept to a low level.

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