Prime focus wide-field corrector designs with lossless atmospheric dispersion correction
- Australian Astron. Observ.
- Fermilab
- University Coll. London
Wide-Field Corrector designs are presented for the Blanco and Mayall telescopes, the CFHT and the AAT. The designs are Terezibh-style, with 5 or 6 lenses, and modest negative optical power. They have 2.2-3 degree fields of view, with curved and telecentric focal surfaces suitable for fiber spectroscopy. Some variants also allow wide-field imaging, by changing the last WFC element. Apart from the adaptation of the Terebizh design for spectroscopy, the key feature is a new concept for a 'Compensating Lateral Atmospheric Dispersion Corrector', with two of the lenses being movable laterally by small amounts. This provides excellent atmospheric dispersion correction, without any additional surfaces or absorption. A novel and simple mechanism for providing the required lens motions is proposed, which requires just 3 linear actuators for each of the two moving lenses.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1295699
- Report Number(s):
- arXiv:1406.4168; FERMILAB-CONF-14-266-AE-CD; 1301132
- Journal Information:
- Proc.SPIE Int.Soc.Opt.Eng., Vol. 9151; Conference: SPIE Astronomical Telescopes + Instrumentation 2014, Montreal, Canada, 06/23-06/27/2014
- Country of Publication:
- United States
- Language:
- English
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