22 July 2016 Novel and efficient ADC concept for BlackGEM telescope
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Ground based telescopes suffer from Atmospheric Dispersion that can be compensated for with an Atmospheric Dispersion Corrector (ADC). In the BlackGEM array of 650 mm diameter telescopes, the ADC is fully integrated in the three-lens field corrector and requires lateral displacement of only one lens for a full correction of the Atmospheric Dispersion. This concept results in a very compact and efficient ADC design without the need for any additional optical components. This paper describes the optical trade-offs, optical design and optimization, as well as the mechanical design and implementation of this novel ADC solution.
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Rik ter Horst, Rik ter Horst, Jan Kragt, Jan Kragt, Dirk Lesman, Dirk Lesman, Ramon Navarro, Ramon Navarro, "Novel and efficient ADC concept for BlackGEM telescope", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99121J (22 July 2016); doi: 10.1117/12.2232348; https://doi.org/10.1117/12.2232348

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