Accurate astronomical atmospheric dispersion models in ZEMAX

P. Spanò

doi:10.1117/12.2057072

28 July 2014 Accurate astronomical atmospheric dispersion models in ZEMAX

P. Spanò

Author Affiliations +

Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 915157 (2014) https://doi.org/10.1117/12.2057072
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

ZEMAX provides a standard built-in atmospheric model to simulate atmospheric refraction and dispersion. This model has been compared with other ones to assess its intrinsic accuracy, critical for very demanding application like ADCs for AO-assisted extremely large telescopes. A revised simple model, based on updated published data of the air refractivity, is proposed by using the “Gradient 5” surface of Zemax. At large zenith angles (65 deg), discrepancies up to 100 mas in the differential refraction are expected near the UV atmospheric transmission cutoff. When high-accuracy modeling is required, the latter model should be preferred.

Citation Download Citation

P. Spanò "Accurate astronomical atmospheric dispersion models in ZEMAX", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915157 (28 July 2014); https://doi.org/10.1117/12.2057072

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