CHOUGH: petite ADC for a high-order adaptive optics system

Daniel Hölck; Nazim Ali Bharmal; Martin Black; David M. Henry; Richard M. Myers

doi:10.1117/12.2231973

22 July 2016 CHOUGH: petite ADC for a high-order adaptive optics system

Daniel Hölck, Nazim Ali Bharmal, Martin Black, David M. Henry, Richard M. Myers

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99126Q (2016) https://doi.org/10.1117/12.2231973
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We discuss the design of a 50mm diameter Atmospheric Dispersion Corrector (ADC) for The CANARY-Hosted Upgrade for High-Order Adaptive Optics (CHOUGH). Usually to avoid pupil actuator-lenslet array mismatch, the ADC is Customarily placed very close to the pupil plane. This design aims to achieve a non-pupil conjugated ADC suitable to be located in any place inside the collimated beam path, this is due to the restrictions given by CHOUGH optical relay. The ADC also needs to satisfy the very small pupil shift requirement, for pupil stability. The ADC is of the Amici prism type, made up of two plates of cemented double prisms. The two plates counter rotate correcting for the different Zenith angles, from the Zenith up to 60°.

Citation Download Citation

Daniel Hölck, Nazim Ali Bharmal, Martin Black, David M. Henry, and Richard M. Myers "CHOUGH: petite ADC for a high-order adaptive optics system", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99126Q (22 July 2016); https://doi.org/10.1117/12.2231973

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