Developing adaptive secondary mirror concepts for the APF and W.M. Keck Observatory based on HVR technology

Philip M. Hinz; Rachel Bowens-Rubin; Christoph Baranec; Kevin Bundy; Mark Chun; Daren Dillon; Brad Holden; Wouter Jonker; Molly Kosiarek; Renate Kupke; Stefan Kuiper; Olivier Lai; Jessica R. Lu; Matthew Maniscalco; Matthew Radovan; Sam Ragland; Stephanie Sallum; Andrew Skemer; Peter Wizinowich

doi:10.1117/12.2563223

13 December 2020 Developing adaptive secondary mirror concepts for the APF and W.M. Keck Observatory based on HVR technology

Philip M. Hinz, Rachel Bowens-Rubin, Christoph Baranec, Kevin Bundy, Mark Chun, Daren Dillon, Brad Holden, Wouter Jonker, Molly Kosiarek, Renate Kupke, Stefan Kuiper, Olivier Lai, Jessica R. Lu, Matthew Maniscalco, Matthew Radovan, Sam Ragland, Stephanie Sallum, Andrew Skemer, Peter Wizinowich

Author Affiliations +

Proceedings Volume 11448, Adaptive Optics Systems VII; 114485U (2020) https://doi.org/10.1117/12.2563223
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

An Adaptive secondary mirror (ASM) allows for the integration of adaptive optics (AO) into the telescope itself. Adaptive secondary mirrors, based on hybrid variable reluctance (HVR) actuator technology, developed by TNO, provide a promising path to telescope-integrated AO. HVR actuators have the advantage of allowing mirrors that are sti↵er, more power ecient, and potentially less complex than similar, voice-coil based ASM’s. We are exploring the application of this technology via a laboratory testbed that will validate the technical approach. In parallel, we are developing conceptual designs for ASMs at several telescopes including the Automated Planet Finder Telescope (APF) and for Keck Observatory. An ASM for APF has the potential to double the light through the slit for radial velocity measurements, and dramatically improved the image stability. An ASM for WMKO enables ground layer AO correction and lower background infrared AO observations, and provides for more flexible deployment of instruments via the ability to adjust the location of the Cassegrain focus.

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Philip M. Hinz, Rachel Bowens-Rubin, Christoph Baranec, Kevin Bundy, Mark Chun, Daren Dillon, Brad Holden, Wouter Jonker, Molly Kosiarek, Renate Kupke, Stefan Kuiper, Olivier Lai, Jessica R. Lu, Matthew Maniscalco, Matthew Radovan, Sam Ragland, Stephanie Sallum, Andrew Skemer, and Peter Wizinowich "Developing adaptive secondary mirror concepts for the APF and W.M. Keck Observatory based on HVR technology", Proc. SPIE 11448, Adaptive Optics Systems VII, 114485U (13 December 2020); https://doi.org/10.1117/12.2563223

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