Dr. Darryl J. Sanchez Profile

Dr. Darryl J. Sanchez

Physicist

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 10 July 2018 Presentation + Paper

Adaptive gain in closed-loop tilt control and adaptive optics

Dennis Montera, James Brown, Odell Reynolds, Miles Buckman, Darryl Sanchez, Denis Oesch, Erica Hoeffner, Michael Bishop, Brian Kay, Tyler Hardy

Proceedings Volume 10703, 107031H (2018) https://doi.org/10.1117/12.2310193

KEYWORDS: Sensors, Actuators, Adaptive optics, Stars, Mirrors, Device simulation, Wavefront sensors, Adaptive control, Signal to noise ratio, Algorithm development

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Proceedings Article | 20 September 2016 Paper

An overview of the RACHL Experiment

Darryl Sanchez, Denis Oesch

Proceedings Volume 9982, 99820O (2016) https://doi.org/10.1117/12.2238210

KEYWORDS: Calibration, Turbulence, Scintillation, Wavefront sensors, Cameras, Sensors, Atmospheric propagation, Adaptive optics, Analytical research, Atmospheric turbulence

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Proceedings Article | 20 September 2016 Paper

Estimation of Kolmogarity through isotropy

Darryl Sanchez, Denis Oesch

Proceedings Volume 9982, 99820P (2016) https://doi.org/10.1117/12.2238253

KEYWORDS: Anisotropy, Atmospheric turbulence, Turbulence, Atmospheric propagation, Wavefront sensors, Sensors, Phase measurement, Analytical research, Current controlled current source, Measurement devices

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Proceedings Article | 20 September 2016 Paper

POAM in starlight: seven years of SAM measurements

Denis Oesch, Darryl Sanchez, Patrick Kelly

Proceedings Volume 9982, 99820N (2016) https://doi.org/10.1117/12.2235796

KEYWORDS: Data archive systems, Turbulence, Atmospheric optics, Adaptive optics, Data conversion, Atmospheric propagation, Wavefronts, Wave propagation, Computer simulations, Analytical research

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SPIE Journal Paper | 17 October 2012

Aggregate behavior of branch points: characterization in wave optical simulation

Denis Oesch, Carolyn Tewksbury-Christle, Darryl Sanchez, Patrick Kelly

OE, Vol. 51, Issue 10, 106001, (October 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.10.106001

KEYWORDS: Turbulence, Optical simulations, Velocity measurements, Optical engineering, Adaptive optics, Atmospheric modeling, Atmospheric turbulence, Wave propagation, Computer simulations, Atmospheric optics

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Proceedings Article | 15 October 2012 Paper

The aggregate behavior of branch points: verification in wave optical simulation II

Denis Oesch, Carolyn Tewksbury-Christle, Darryl Sanchez, Patrick Kelly

Proceedings Volume 8520, 852003 (2012) https://doi.org/10.1117/12.928502

KEYWORDS: Turbulence, Optical simulations, Velocity measurements, Atmospheric modeling, Multilayers, Atmospheric turbulence, Computer simulations, Atmospheric propagation, Atmospheric optics, Wavefront sensors

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Proceedings Article | 15 October 2012 Paper

Hiding the phase: the filling of the slope discrepancy Hilbert space

Darryl Sanchez, Denis Oesch

Proceedings Volume 8520, 852004 (2012) https://doi.org/10.1117/12.932282

KEYWORDS: Turbulence, Atmospheric propagation, Spiral phase plates, Photons, Beam propagation method, Adaptive optics, Light wave propagation, Wave propagation, Atmospheric optics, Estimation theory

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Proceedings Article | 15 October 2012 Paper

Understanding the physics of optical deep turbulence at the Earth's boundary layer

Thomas Farrell, Darryl Sanchez, Julie Smith, Jason Holzman, Patrick Kelly, Terry Brennan, Anita Gallegos, Denis Oesch, Demos Kyrazis

Proceedings Volume 8520, 85200H (2012) https://doi.org/10.1117/12.931432

KEYWORDS: Atmospheric modeling, Turbulence, Heat flux, Kinematics, Solar radiation models, Optical turbulence, Physics, Solar energy, Clouds, Mathematical modeling

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Proceedings Article | 7 May 2012 Paper

The aggregate behavior of branch points: verification in wave optical simulation I

Denis Oesch, Carolyn Tewksbury-Christle, Darryl Sanchez, Patrick Kelly

Proceedings Volume 8380, 83800O (2012) https://doi.org/10.1117/12.921479

KEYWORDS: Turbulence, Optical simulations, Atmospheric optics, Atmospheric modeling, Atmospheric turbulence, Adaptive optics, Atmospheric propagation, Phase measurement, Wave propagation, Velocity measurements

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Proceedings Article | 7 May 2012 Paper

The aggregate behavior of branch points: theoretical calculation of branch point velocity

Darryl Sanchez, Denis Oesch, Patrick Kelly

Proceedings Volume 8380, 83800P (2012) https://doi.org/10.1117/12.921501

KEYWORDS: Atmospheric propagation, Turbulence, Light wave propagation, Velocity measurements, Optical vortices, Phase measurement, Wave propagation, Radio propagation, Atmospheric turbulence, Analytical research

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Proceedings Article | 5 May 2012 Paper

High contrast imaging in the presence of turbulence

Brett Sickmiller, Denis Oesch, Darryl Sanchez, Patrick Kelly

Proceedings Volume 8380, 83800F (2012) https://doi.org/10.1117/12.921492

KEYWORDS: Point spread functions, Coronagraphy, Turbulence, Imaging systems, Atmospheric turbulence, Adaptive optics, Distortion, Atmospheric optics, Composites, Planets

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Proceedings Article | 12 August 2010 Paper

Experimental analysis of diffraction effects from a segmented MEMS deformable mirror for a closed loop adaptive optics system

Katia Shtyrkova, Loretta Arguello, Denis Oesch, Darryl Sanchez, Patrick Kelly, Carolyn Tewksbury-Christle, Julie Smith

Proceedings Volume 7816, 781608 (2010) https://doi.org/10.1117/12.861544

KEYWORDS: Microelectromechanical systems, Diffraction, Phase measurement, Data modeling, Turbulence, Adaptive optics, Linear filtering, Diffraction gratings, Actuators, Iris

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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 | 12 August 2010 Paper

The aggregate behavior of branch points: altitude and strength of atmospheric turbulence layers

Denis Oesch, Darryl Sanchez, Carolyn Tewksbury-Christle, Patrick Kelly

Proceedings Volume 7816, 781605 (2010) https://doi.org/10.1117/12.859454

KEYWORDS: Turbulence, Phase measurement, Atmospheric turbulence, Atmospheric optics, Atmospheric propagation, Velocity measurements, Atmospheric modeling, Computer simulations, Adaptive optics, Wave propagation

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Proceedings Article | 12 August 2010 Paper

The aggregate behavior of branch points: a proposal for an atmospheric turbulence layer sensor

Darryl Sanchez, Denis Oesch, Carolyn Tewksbury-Christle, Patrick Kelly

Proceedings Volume 7816, 781606 (2010) https://doi.org/10.1117/12.859883

KEYWORDS: Turbulence, Sensors, Atmospheric propagation, Atmospheric turbulence, Wave propagation, Wavefront sensors, Adaptive optics, Atmospheric optics, Mirrors, Telescopes

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Proceedings Article | 12 August 2010 Paper

Fitting error in deep turbulence for a flat subaperture segmented deformable mirror

Darryl Sanchez, Denis Oesch, Patrick Kelly

Proceedings Volume 7816, 781607 (2010) https://doi.org/10.1117/12.862568

KEYWORDS: Adaptive optics, Turbulence, Deformable mirrors, Atmospheric propagation, Actuators, Telescopes, Phase measurement, Wave propagation, Mirrors, Error analysis

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