Unspecified Ruihan Zhang Profile

Ruihan Zhang

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Publications (8)

Proceedings Article | 27 August 2024 Presentation + Paper

Commissioning results from the Robo-AO-2 facility for rapid visible and near-infrared AO imaging

Christoph Baranec, James Ou, Reed Riddle, Ruihan Zhang, Luke Mckay, Rachel Rampy, Morgan Bonnet, Iven Hamilton, Greg Ching, Jessica Young, Maïssa Salama, Paul Barnes, Shane Jacobson, Peter Onaka, Mark Chun, Zachary Werber, Keith Powell, Marcos van Dam, Benjamin Shappee

Proceedings Volume 13097, 130970G (2024) https://doi.org/10.1117/12.3019346

KEYWORDS: Telescopes, Adaptive optics, Cameras, Wavefront sensors, Mirrors, Device simulation, Stars, Sensors, Tunable filters, Equipment

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Proceedings Article | 27 August 2024 Poster + Paper

In-lab and on-sky closed-loop results of adaptive secondary mirrors with TNO’s hybrid variable reluctance actuators

Ruihan Zhang, Max Baeten, Mark Chun, Ellen Lee, Michael Connelley, Olivier Lai, Stefan Kuiper, Alan Ryan, Arjo Bos, Rachel Bowens-Rubin, Philip Hinz

Proceedings Volume 13097, 130975K (2024) https://doi.org/10.1117/12.3019167

KEYWORDS: Actuators, Wavefront sensors, Adaptive optics, Cameras, Telescopes, Infrared cameras, Real-time computing, Tunable filters, Lead, Frequency response

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Proceedings Article | 27 August 2024 Poster + Paper

Simulation results for Robo-AO-2 using HAPA: a wavefront sensing technique for improving the adaptive optics correction of fainter stars

Ruihan Zhang, Christoph Baranec, Marcos van Dam, Mark Chun, Reed Riddle, James Ou

Proceedings Volume 13097, 130973Y (2024) https://doi.org/10.1117/12.3019148

KEYWORDS: Wavefront sensors, Stars, Adaptive optics, Exoplanets, Imaging systems, Turbulence, Device simulation, Laser guide stars, Telescopes, Quantum noise

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Proceedings Article | 27 August 2024 Presentation + Paper

First laboratory and on-sky results of an adaptive secondary mirror with TNO-style actuators on the NASA Infrared Telescope Facility

Ellen Lee, Mark Chun, Olivier Lai, Ruihan Zhang, Max Baeten, Arjo Bos, Matias Kidron, Fred Kamphues, Stefan Kuiper, Wouter Jonker, Michael Connelley, John Rayner, Alan Ryan, Philip Hinz, Rachel Bowens-Rubin, Charles Lockhart, Michael Kelii

Proceedings Volume 13097, 130972P (2024) https://doi.org/10.1117/12.3016132

KEYWORDS: Actuators, Mirrors, Telescopes, Mirror surfaces, Deformable mirrors, Adaptive mirrors, Adaptive optics, Astronomical adaptive optics

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Proceedings Article | 26 August 2024 Presentation + Paper

Status and first results of the NASA IRTF adaptive secondary mirror

Arjo Bos, Bert Dekker, Max Baeten, Stefan Kuiper, Matias Kidron, Esperanza Vielba Salcedo, Rafiek Vermeulen, Jan Kuijt, Kristian Boot, Bart van Venrooy, Robin van Buuren, Fred Kamphues, Wouter Jonker, Matthew Maniscalco, Mark Chun, Michael Connelley, Alan Ryan, Ellen Lee, Ruihan Zhang, Olivier Lai, Jeroen Vleggaar, Philip Hinz

Proceedings Volume 13100, 1310013 (2024) https://doi.org/10.1117/12.3020085

KEYWORDS: Actuators, Adaptive mirrors, Telescopes, Mirrors, Sensors, Deformable mirrors, Design, Adaptive optics, Wavefront sensors, Manufacturing

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Proceedings Article | 30 August 2022 Poster + Paper

Progress on the University of Hawaii 2.2-meter adaptive secondary mirror

Mark Chun, Alan Ryan, Ruihan Zhang, Stefan Kuiper, Gilles Ackaert, Christoph Baranec, M. J. Baeten, Arjo Bos, Rachel Bowens-Rubin, Bert Dekker, Ryan Dungee, Taavishe Gupta, Phil Hinz, Wouter Jonker, Fred Kamphues, Olivier Lai, Jessica Lu, Matt Maniscalco, Bert Monna, Manav Nair, Jan Nijenhuis, Hans Priem, Paul-Alexander Vogel

Proceedings Volume 12185, 121857U (2022) https://doi.org/10.1117/12.2629046

KEYWORDS: Mirrors, Telescopes, Adaptive optics, Wavefront sensors, Actuators, Deflectometry

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Proceedings Article | 30 August 2022 Poster + Paper

In-lab calibration and testing of adaptive secondary mirrors using phase measuring deflectometry

Ruihan Zhang, Mark Chun

Proceedings Volume 12185, 1218569 (2022) https://doi.org/10.1117/12.2627278

KEYWORDS: Mirrors, Cameras, Deflectometry, Actuators, Prototyping, Wavefronts, Fringe analysis, Calibration, Telescopes, Adaptive optics

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Proceedings Article | 13 December 2020 Presentation + Paper

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

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

Proceedings Volume 11448, 114481E (2020) https://doi.org/10.1117/12.2562847

KEYWORDS: Astronomical telescopes, Telescopes, Astronomy, Actuators, Mirrors, Thermography, Adaptive optics, Control systems, Calibration, Visible radiation

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Showing 5 of 8 publications

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