A new adaptive secondary mirror for astronomy on the University of Hawaii 2.2-meter telescope

Mark Chun; Christoph Baranec; Olivier Lai; Jessica R. Lu; Ruihan Zhang; Stefan Kuiper; Wouter Jonker; Matthew Maniscalco

doi:10.1117/12.2562847

13 December 2020 A new adaptive secondary mirror for astronomy on the University of Hawaii 2.2-meter telescope

Mark Chun, Christoph Baranec, Olivier Lai, Jessica R. Lu, Ruihan Zhang, Stefan Kuiper, Wouter Jonker, Matthew Maniscalco

Author Affiliations +

Proceedings Volume 11448, Adaptive Optics Systems VII; 114481E (2020) https://doi.org/10.1117/12.2562847
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We are developing a new adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope based on a novel and very efficient hybrid variable reluctance actuator developed by TNO. The actuator technology has broad implications on the ASM design and results in an ASM with a thicker facesheet, lower power dissipation, and simple controls. We report here preparations and plans for lab testing as well as on-sky demonstration of the ASM. The lab calibrations of the ASM influence functions will use a phase measuring deflectometry setup. The on-sky tests will include the evaluation of the use of the ASM for narrow field AO observations at visible through near infrared wavelengths, for very wide fields of view ground-layer adaptive optics, and for seeing limited non-adaptive optics observations.

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Mark Chun, Christoph Baranec, Olivier Lai, Jessica R. Lu, Ruihan Zhang, Stefan Kuiper, Wouter Jonker, and Matthew Maniscalco "A new adaptive secondary mirror for astronomy on the University of Hawaii 2.2-meter telescope", Proc. SPIE 11448, Adaptive Optics Systems VII, 114481E (13 December 2020); https://doi.org/10.1117/12.2562847

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