Optical design of a broadband atmospheric dispersion corrector for MAVIS

Davide Greggio; Christian Schwab; Demetrio Magrin; Simone Di Filippo; Valentina Viotto; François Rigaut

doi:10.1117/12.2561406

13 December 2020 Optical design of a broadband atmospheric dispersion corrector for MAVIS

Davide Greggio, Christian Schwab, Demetrio Magrin, Simone Di Filippo, Valentina Viotto, François Rigaut

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 1144755 (2020) https://doi.org/10.1117/12.2561406
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

"The MCAO Assisted Visible Imager and Spectrograph (MAVIS), is a new instrument for ESO’s Very Large Telescope. The science instruments, namely an imager and a spectrograph observing at VIS wavelengths (370-1000nm), are fed by a MCAO module which performs wide field wavefront sensing and correction by means of both NGS and LGS stars. To maximize sky coverage, tip-tilt sensing is done at NIR wavelengths (1000-1700 nm) by selecting up to three stars in a 2arcmin FoV. In order to maximize the stability between NGS wavefront sensor and scientific instruments, we designed a common-path Atmospheric Dispersion Corrector (ADC) able to efficiently compensate for atmospheric differential refraction in the full wavelength range used by the MAVIS sub-systems. In this paper we present the design of the ADC. A few possible combinations of glasses are proposed and compared in terms of residual chromatic aberration, throughput, exit pupil movement and total thickness of the prism assembly."

Citation Download Citation

Davide Greggio, Christian Schwab, Demetrio Magrin, Simone Di Filippo, Valentina Viotto, and François Rigaut "Optical design of a broadband atmospheric dispersion corrector for MAVIS", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144755 (13 December 2020); https://doi.org/10.1117/12.2561406

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