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Title: Prime focus wide-field corrector designs with lossless atmospheric dispersion correction

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.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Australian Astron. Observ.
  2. Fermilab
  3. University Coll. London
Publication Date:
OSTI Identifier:
1295699
Report Number(s):
arXiv:1406.4168; FERMILAB-CONF-14-266-AE-CD
1301132
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Journal Name: Proc.SPIE Int.Soc.Opt.Eng.; Journal Volume: 9151; Conference: SPIE Astronomical Telescopes + Instrumentation 2014, Montreal, Canada, 06/23-06/27/2014
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY