Dr. Keith B. Powell Profile

Dr. Keith B. Powell

Adaptive optics scientist at Univ of Arizona

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Publications (12)

Proceedings Article | 30 July 2018 Paper

Developing new adaptive secondary electronics for the MAPS project

P. Hinz, E. Downey, O. Montoya, J. Ford, K. Powell, R. Hill

Proceedings Volume 10703, 1070369 (2018) https://doi.org/10.1117/12.2314278

KEYWORDS: Actuators, Electronics, Sensors, Adaptive optics, Wavefronts, Telescopes, Exoplanets, Control systems

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Proceedings Article | 24 July 2014 Paper

Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam

D. Defrère, P. Hinz, E. Downey, D. Ashby, V. Bailey, G. Brusa , J. Christou, W. Danchi, P. Grenz, J. Hill, W. Hoffmann, J. Leisenring, J. Lozi, T. McMahon, B. Mennesson, R. Millan-Gabet, M. Montoya, K. Powell, A. Skemer, V. Vaitheeswaran, A. Vaz, C. Veillet

Proceedings Volume 9146, 914609 (2014) https://doi.org/10.1117/12.2057178

KEYWORDS: Telescopes, Mirrors, Phase measurement, Interferometry, Nulling interferometry, Sensors, Space telescopes, Interferometers, Infrared imaging, Exoplanets

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Proceedings Article | 29 May 2013 Paper

Adaptive optics for fiber-fed interferometers

Michael Hart, Thomas Stalcup, Olivier Durney, Nicholas Emerson, Keith Powell, Michael Ward, Greg Feller, Rick Kendrick, James Mason, Matthew Bold, Larry Dewell, Tracy Kubo

Proceedings Volume 8725, 87250U (2013) https://doi.org/10.1117/12.2018046

KEYWORDS: Adaptive optics, Telescopes, Interferometers, Cameras, Sensors, Mirrors, Space telescopes, Beam splitters, Image quality, Spatial frequencies

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Proceedings Article | 16 September 2011 Paper

Latest GLAO results and advancements in laser tomography implementation at the 6.5m MMT telescope

Eduardo Bendek, Michael Hart, Keith Powell, Vidhya Vaitheeswaran, Don McCarthy, Craig Kulesa

Proceedings Volume 8149, 814907 (2011) https://doi.org/10.1117/12.894149

KEYWORDS: Tomography, Telescopes, Stars, Wavefronts, Adaptive optics, Point spread functions, Cameras, Wavefront sensors, Laser guide stars, Turbulence

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Proceedings Article | 14 July 2010 Paper

Status of the 6.5m MMT Telescope laser adaptive optics system

Eduardo Bendek, Michael Hart, Keith Powell, Norman Milton, Vidhya Vaitheeswaran, Don McCarthy, Craig Kulesa, Shawn Callahan, S. Mark Ammons, Aurea Garcia Rissmann

Proceedings Volume 7736, 77360O (2010) https://doi.org/10.1117/12.857663

KEYWORDS: Wavefronts, Adaptive optics, Tomography, Stars, Telescopes, Actuators, Laser optics, Wavefront sensors, Control systems, Matrices

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Proceedings Article | 14 July 2010 Paper

Implementation and on-sky results of an optimal wavefront controller for the MMT NGS adaptive optics system

Keith Powell, Vidhya Vaitheeswaran

Proceedings Volume 7736, 773636 (2010) https://doi.org/10.1117/12.856590

KEYWORDS: Wavefronts, Adaptive optics, Mirrors, Data modeling, Telescopes, Image quality standards, K band, Atmospheric optics, Deformable mirrors, Sensors

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Proceedings Article | 1 September 2009 Paper

Wide field astronomical image compensation with multiple laser-guided adaptive optics

Michael Hart, N. Mark Milton, Christoph Baranec, Thomas Stalcup, Keith Powell, Eduardo Bendek, Don McCarthy, Craig Kulesa

Proceedings Volume 7468, 74680L (2009) https://doi.org/10.1117/12.827301

KEYWORDS: Telescopes, Adaptive optics, Stars, Mirrors, Sensors, Wavefront sensors, Cameras, K band, Wavefronts, Astronomy

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Proceedings Article | 23 July 2008 Paper

Image motion correction using accelerometers at the MMT Observatory

T. Stalcup, K. Powell

Proceedings Volume 7018, 70181H (2008) https://doi.org/10.1117/12.790113

KEYWORDS: Cameras, Telescopes, Motion measurement, Mirrors, Optical filters, Adaptive optics, Observatories, Image filtering, Wavefront sensors, Laser guide stars

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Proceedings Article | 21 July 2008 Paper

A nonlinear disturbance-decoupled elevation axis controller for the Multiple Mirror Telescope

Dusty Clark, Tom Trebisky, Keith Powell

Proceedings Volume 7019, 70192J (2008) https://doi.org/10.1117/12.793287

KEYWORDS: Telescopes, Mirrors, Simulink, Computer programming, Control systems, Servomechanisms, Amplifiers, Optical instrument design, System identification, Device simulation

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Proceedings Article | 11 July 2008 Paper

Commissioning the MMT ground-layer and laser tomography adaptive optics systems

N. Mark Milton, Michael Lloyd-Hart, Christoph Baranec, Thomas Stalcup, Keith Powell, Don McCarthy, Craig Kulesa, Keith Hege

Proceedings Volume 7015, 701522 (2008) https://doi.org/10.1117/12.788541

KEYWORDS: Adaptive optics, Stars, Telescopes, Servomechanisms, Point spread functions, Laser optics, Tomography, Diffraction, Charge-coupled devices, Imaging systems

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Proceedings Article | 24 September 2007 Paper

Multi-laser-guided adaptive optics for the Large Binocular Telescope

M. Lloyd-Hart, R. Angel, R. Green, T. Stalcup, N. Milton, K. Powell

Proceedings Volume 6691, 66910O (2007) https://doi.org/10.1117/12.734821

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Cameras, Infrared imaging, Control systems, Stars, Thermography, Sodium, Sensors

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Proceedings Article | 27 June 2006 Paper

The Large Binocular Telescope mount control system architecture

David Ashby, Dan McKenna, Joar Brynnel, Tom Sargent, Dan Cox, John Little, Keith Powell, Gene Holmberg

Proceedings Volume 6274, 627423 (2006) https://doi.org/10.1117/12.671983

KEYWORDS: Computer programming, Control systems, Digital signal processing, Telescopes, Mirrors, Field programmable gate arrays, Clocks, Photonic integrated circuits, Local area networks, Head

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Showing 5 of 12 publications

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