Dr. James M. Brown Profile

Dr. James M. Brown

Controls Engineer at Air Force Research Lab

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Author

Publications (14)

Proceedings Article | 12 August 2010 Paper

An experimental study showing the effects on a standard PI controller using a segmented MEMS DM acting as a mod(lambda) device

Julie Smith, James Brown, Darryl Sanchez, Denis Oesch, Patrick Kelly, Katia Shtyrkova, Carolyn Tewksbury-Christle

Proceedings Volume 7816, 78160H (2010) https://doi.org/10.1117/12.859837

KEYWORDS: Microelectromechanical systems, Actuators, Mirrors, Adaptive optics, Wavefronts, Phase measurement, Imaging systems, Wavefront sensors, Servomechanisms, Deformable mirrors

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Proceedings Article | 18 October 2004 Paper

Active tracking with moderate power lasers

Jim Riker, Robert Fugate, Trae Holcomb, Joshua Kann, William Lowrey, Ann Slavin, James Spinhirne, Andrea Tuffli, James Brown

Proceedings Volume 5552, (2004) https://doi.org/10.1117/12.562298

KEYWORDS: Satellites, 3D modeling, Sensors, Control systems, Data modeling, Transmitters, Optical tracking, Signal to noise ratio, Active optics, Retroreflectors

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Proceedings Article | 7 February 2003 Paper

Tracker development for the Starfire Optical Range 3.5-meter telescope adaptive optics system

James Brown

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458946

KEYWORDS: Mirrors, Optical tracking, Control systems, Adaptive optics, Filtering (signal processing), Sensors, Electronics, Telescopes, Stochastic processes, Control systems design

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Proceedings Article | 4 February 2003 Paper

Care and cleaning of the Starfire Optical Range's 3.5-m primary mirror

James Brown, Roger Petty

Proceedings Volume 4837, (2003) https://doi.org/10.1117/12.457970

KEYWORDS: Mirrors, Coating, Reflectivity, Surface roughness, Aluminum, Safety, Glasses, Analytical research, Directed energy weapons, Scatter measurement

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Proceedings Article | 27 September 1999 Paper

Preliminary experimental evidence of anisotropy of turbulence and the effect of non-Kolmogorov turbulence on wavefront tilt statistics

Mikhail Belen'kii, Jeffrey Barchers, Stephen Karis, Christina Osmon, James Brown, Robert Fugate

Proceedings Volume 3762, (1999) https://doi.org/10.1117/12.363597

KEYWORDS: Telescopes, Turbulence, Anisotropy, Wavefronts, Atmospheric modeling, Stars, Cameras, Data modeling, Wave propagation, Data acquisition

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Proceedings Article | 27 September 1999 Paper

Experimental validation of tilt measurement technique with a laser beacon

Mikhail Belen'kii, Stephen Karis, James Brown, Robert Fugate

Proceedings Volume 3762, (1999) https://doi.org/10.1117/12.363596

KEYWORDS: Telescopes, Turbulence, Atmospheric sensing, Wavefronts, Wavefront sensors, Adaptive optics, Receivers, Motion measurement, Laser guide stars, Charge-coupled devices

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Proceedings Article | 27 September 1999 Paper

Real-time adaptive optimization of track loop controllers in adaptive optics systems as a function of input statistics and sensor gain

Jeffrey Barchers, James Brown

Proceedings Volume 3762, (1999) https://doi.org/10.1117/12.363563

KEYWORDS: Sensors, CCD image sensors, Mirrors, Charge-coupled devices, Adaptive optics, Algorithm development, Optimization (mathematics), Detection and tracking algorithms, Device simulation, Performance modeling

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Proceedings Article | 19 July 1999 Paper

Experimental evidence of the effects of non-Kolmogorov turbulence and anisotropy of turbulence

Mikhail Belen'kii, Stephen Karis, Christina Osmon, James Brown, Robert Fugate

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354860

KEYWORDS: Telescopes, Turbulence, Anisotropy, Wavefronts, Stars, Adaptive optics, Optical filters, Statistical analysis, Domes, Optical design

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Proceedings Article | 11 September 1998 Paper

Phase and slope screen generator for spatially and temporally correlated unlimited length sequences

Dennis Montera, Brent Ellerbroek, James Brown

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321729

KEYWORDS: Error analysis, Monochromatic aberrations, Statistical analysis, Solids, Adaptive optics, Estimation theory, Optical simulations, Matrices, Copper, Computing systems

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Proceedings Article | 11 September 1998 Paper

Starfire Optical Range 3.5-m telescope adaptive optical system

James Spinhirne, Jeff Allen, George Ameer, James Brown, Julian Christou, Terry Duncan, R. Eager, Mark Ealey, Brent Ellerbroek, Robert Fugate, Gary Jones, R. Kuhns, David Lee, William Lowrey, Michael Oliker, Raymond Ruane, David Swindle, Joshua Voas, Walter Wild, Keith Wilson, John Wynia

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321689

KEYWORDS: Sensors, Adaptive optics, Telescopes, Mirrors, Actuators, Deformable mirrors, Cameras, Digital signal processing, CCD image sensors, CCD cameras

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Proceedings Article | 17 October 1997 Paper

Measurements of tilt angular anisoplanatism

Mikhail Belen'kii, Stephen Karis, James Brown, Robert Fugate

Proceedings Volume 3126, (1997) https://doi.org/10.1117/12.290165

KEYWORDS: Telescopes, Stars, Motion measurement, CCD cameras, Image resolution, Turbulence, Data processing, Data modeling, Wavefronts, Imaging systems

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Proceedings Article | 17 October 1997 Paper

Experimental study of the effect of non-Kolmogorov stratospheric turbulence on star image motion

Mikhail Belen'kii, Stephen Karis, James Brown, Robert Fugate

Proceedings Volume 3126, (1997) https://doi.org/10.1117/12.290143

KEYWORDS: Telescopes, Turbulence, Stars, Atmospheric modeling, Data modeling, Motion models, Space telescopes, Motion measurement, Anisotropy, Scintillation

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Proceedings Article | 17 October 1997 Paper

CCD tracker development at the Starfire Optical Range

James Brown, Dennis Montera

Proceedings Volume 3126, (1997) https://doi.org/10.1117/12.290147

KEYWORDS: Charge-coupled devices, Digital signal processing, Filtering (signal processing), Detection and tracking algorithms, Mirrors, Optical tracking, Sensors, Adaptive optics, Simulink, CCD image sensors

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Proceedings Article | 17 October 1997 Paper

Automatic centroid calculation gain control in the new SOR CCD tracker

Dennis Montera, James Brown

Proceedings Volume 3126, (1997) https://doi.org/10.1117/12.290161

KEYWORDS: Adaptive optics, Automatic tracking, Sensors, Automatic control, Stars, Charge-coupled devices, Optical tracking, Chlorine, Detection and tracking algorithms, Algorithm development

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Showing 5 of 14 publications

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