Dr. Jonathan Ko Profile

Dr. Jonathan Ko

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Publications (15)

Proceedings Article | 7 October 2019 Paper

Characterization and compensation of atmospheric effects on laser beams

Miranda van Iersel, Daniel Paulson, Nathaniel Ferlic, Jonathan Ko, Chensheng Wu, John Rzasa, Christopher Davis

Proceedings Volume 11161, 1116107 (2019) https://doi.org/10.1117/12.2534755

KEYWORDS: Atmospheric optics, Atmospheric propagation, Laser countermeasures, Optical turbulence, Laser beam propagation, Spatial coherence, Atmospheric sensing, Adaptive optics, Sensors, Turbulence

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Proceedings Article | 18 September 2018 Presentation + Paper

A multi-aperture laser transmissometer for detailed characterization of laser propagation over long paths through the turbulent atmosphere

Daniel Paulson, Chensheng Wu, John Rzasa, Jonathan Ko, Miranda Van Iersel, Joseph Coffaro, Christopher Smith, Robert Crabbs, Christopher Davis

Proceedings Volume 10770, 107700J (2018) https://doi.org/10.1117/12.2322586

KEYWORDS: Turbulence, Receivers, Sensors, Visibility, Transmitters, Atmospheric propagation, Signal detection, Refractive index, Laser beam propagation, Mass attenuation coefficient

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Proceedings Article | 7 September 2017 Presentation + Paper

Hybrid wavefront sensing and image correction algorithm for imaging through turbulent media

Chensheng Wu, John Robertson Rzasa, Jonathan Ko, Christopher Davis

Proceedings Volume 10408, 104080Y (2017) https://doi.org/10.1117/12.2275735

KEYWORDS: Wavefront sensors, Image sensors, Turbulence, Cameras, Reconstruction algorithms, Sensors, Wavefronts, Image processing, Sensor calibration, Image restoration

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Proceedings Article | 30 August 2017 Presentation + Paper

Atmospheric characterization on the Kennedy Space Center Shuttle Landing Facility

Jonathan Ko, Joseph Coffaro, Chensheng Wu, Daniel Paulson, Christopher Davis

Proceedings Volume 10408, 104080P (2017) https://doi.org/10.1117/12.2276297

KEYWORDS: Atmospheric turbulence, Atmospheric optics, Sensors, Turbulence, Atmospheric propagation, Atmospheric scintillation, Atmospheric sensing, Scintillation, Wavefront sensors, Adaptive optics

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Proceedings Article | 30 August 2017 Presentation + Paper

Phase and amplitude modification of a laser beam by two deformable mirrors using conventional 4f image encryption techniques

Chensheng Wu, Jonathan Ko, John Robertson Rzasa, Christopher Davis

Proceedings Volume 10408, 1040803 (2017) https://doi.org/10.1117/12.2275733

KEYWORDS: Image encryption, Deformable mirrors, Turbulence, Beam shaping, Phase modulation, Fourier transforms, Adaptive optics, Control systems, Gaussian beams

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Proceedings Article | 19 September 2016 Presentation + Paper

Complex wavefront sensing with a plenoptic sensor

Chensheng Wu, Jonathan Ko, Christopher Davis

Proceedings Volume 9979, 99790Y (2016) https://doi.org/10.1117/12.2239117

KEYWORDS: Sensors, Wavefront sensors, Turbulence, Wavefronts, Image sensors, Distortion, Adaptive optics, Objectives, Free space optics, Associative arrays

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Proceedings Article | 19 September 2016 Presentation + Paper

Implementation of a rapid correction algorithm for adaptive optics using a plenoptic sensor

Jonathan Ko, Chensheng Wu, Christopher Davis

Proceedings Volume 9979, 99790O (2016) https://doi.org/10.1117/12.2239364

KEYWORDS: Sensors, Adaptive optics, Atmospheric turbulence, Reconstruction algorithms, Wavefront sensors, Wavefronts, Wavefront reconstruction, Deformable mirrors, Objectives, Actuators

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Proceedings Article | 19 September 2016 Presentation + Paper

Imaging through water turbulence with a plenoptic sensor

Chensheng Wu, Jonathan Ko, Christopher Davis

Proceedings Volume 9979, 99790Z (2016) https://doi.org/10.1117/12.2239118

KEYWORDS: Turbulence, Image processing, Sensors, Image sensors, Cameras, Distortion, Imaging systems, Wavefronts, Specular reflections, Water

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Proceedings Article | 4 September 2015 Paper

An adaptive optics approach for laser beam correction in turbulence utilizing a modified plenoptic camera

Jonathan Ko, Chensheng Wu, Christopher Davis

Proceedings Volume 9614, 96140I (2015) https://doi.org/10.1117/12.2191180

KEYWORDS: Wavefronts, Reconstruction algorithms, Cameras, Deformable mirrors, Adaptive optics, Actuators, Turbulence, Wavefront sensors, Sensors, Zernike polynomials

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Proceedings Article | 4 September 2015 Paper

Imaging through turbulence using a plenoptic sensor

Chensheng Wu, Jonathan Ko, Christopher Davis

Proceedings Volume 9614, 961405 (2015) https://doi.org/10.1117/12.2190975

KEYWORDS: Turbulence, Sensors, Image sensors, Image processing, Atmospheric turbulence, 3D image processing, Cameras, Stereoscopy, Panoramic photography, Image retrieval

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Proceedings Article | 4 September 2015 Paper

Entropy studies on beam distortion by atmospheric turbulence

Chensheng Wu, Jonathan Ko, Christopher Davis

Proceedings Volume 9614, 96140F (2015) https://doi.org/10.1117/12.2190974

KEYWORDS: Sensors, Wavefront sensors, Distortion, Turbulence, Image sensors, Atmospheric turbulence, Adaptive optics, Reconstruction algorithms, Wavefronts, Deformable mirrors

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Proceedings Article | 16 March 2015 Paper

Object recognition through turbulence with a modified plenoptic camera

Chensheng Wu, Jonathan Ko, Christopher Davis

Proceedings Volume 9354, 93540V (2015) https://doi.org/10.1117/12.2080083

KEYWORDS: Turbulence, Cameras, Image processing, Neodymium, Mendelevium, Atmospheric turbulence, Distortion, Object recognition, Image resolution, Atmospheric propagation

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Proceedings Article | 7 October 2014 Paper

Experimental results on the enhanced backscatter phenomenon and its dynamics

Chensheng Wu, William Nelson, Jonathan Ko, Christopher Davis

Proceedings Volume 9224, 922412 (2014) https://doi.org/10.1117/12.2062952

KEYWORDS: Turbulence, Backscatter, Adaptive optics, Cameras, Retroreflectors, Beam splitters, Scintillation, Mirrors, Atmospheric turbulence, Atmospheric propagation

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Proceedings Article | 7 October 2014 Paper

Intelligent correction of laser beam propagation through turbulent media using adaptive optics

Jonathan Ko, Chensheng Wu, Christopher Davis

Proceedings Volume 9224, 92240E (2014) https://doi.org/10.1117/12.2062951

KEYWORDS: Cameras, Wavefronts, Actuators, Wavefront sensors, Reconstruction algorithms, Deformable mirrors, Turbulence, Adaptive optics, Atmospheric propagation, Objectives

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Proceedings Article | 7 October 2014 Paper

Phase and amplitude wave front sensing and reconstruction with a modified plenoptic camera

Chensheng Wu, Jonathan Ko, William Nelson, Christopher Davis

Proceedings Volume 9224, 92240G (2014) https://doi.org/10.1117/12.2062948

KEYWORDS: Cameras, Reconstruction algorithms, Deformable mirrors, Adaptive optics, Wavefronts, Turbulence, Zernike polynomials, Wavefront sensors, Atmospheric turbulence, Receivers

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Showing 5 of 15 publications

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