Dr. Richard G. Paxman Profile

Dr. Richard G. Paxman

Chief Scientist at Maxar Technologies

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 3 October 2023 Presentation + Paper

One-sided imaging of non-fluorescing objects through scattering media

Richard Paxman, David Carrara

Proceedings Volume 12693, 1269305 (2023) https://doi.org/10.1117/12.2681695

KEYWORDS: Diffusers, Matrices, Scattering media, Turbulence, Reflection, Image sharpness, Data modeling, Light sources and illumination, Light scattering, Speckle

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Proceedings Article | 6 September 2019 Presentation + Paper

Estimation ambiguities encountered when imaging through turbulence

R. Paxman, D. Carrara, J. Miller, K. Gleichman, M. Rucci, B. Karch

Proceedings Volume 11135, 111350G (2019) https://doi.org/10.1117/12.2533979

KEYWORDS: Wavefronts, Turbulence, Point spread functions, Adaptive optics, Speckle, Deconvolution, Phase retrieval, Speckle imaging, Astronomical imaging

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Proceedings Article | 16 February 2012 Paper

MEMS spatial light modulators for controlled optical transmission through nearly opaque materials

Thomas Bifano, Yang Lu, Christopher Stockbridge, Aaron Berliner, John Moore, Richard Paxman, Santosh Tripathi, Kimani Toussaint

Proceedings Volume 8253, 82530L (2012) https://doi.org/10.1117/12.911384

KEYWORDS: Spatial light modulators, Cameras, Scattering, Microelectromechanical systems, Optimization (mathematics), Opacity, Mirrors, Laser scattering, Scattering media, Transmittance

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Proceedings Article | 26 August 2008 Paper

Operation of phase-diverse adaptive-optics with extended scenes

Matthew Warmuth, Stuart Parker, Aaron Wilson, Kurt Gleichman, Richard Paxman, Brian Thelen, Ryan Murphy, Jason Hunt, Joel LeBlanc

Proceedings Volume 7093, 709307 (2008) https://doi.org/10.1117/12.795391

KEYWORDS: Wavefront sensors, Control systems, Wavefronts, Calibration, Adaptive optics, Error analysis, Mirrors, Deformable mirrors, Astronomy, Actuators

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Proceedings Article | 27 September 2007 Paper

High-speed closed-loop dual deformable-mirror phase-diversity testbed

James Georges, Pam Dorrance, Kurt Gleichman, Julie Jonik, Dean Liskow, Harold Lapprich, Vipul Naik, Stuart Parker, Rick Paxman, Matt Warmuth, Aaron Wilson, Tom Zaugg

Proceedings Volume 6711, 671105 (2007) https://doi.org/10.1117/12.732165

KEYWORDS: Wavefronts, Process control, Calibration, Imaging systems, Image processing, Fermium, Frequency modulation, Beam splitters, Cameras, Control systems

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Proceedings Article | 27 September 2007 Paper

Phase-diverse adaptive optics for future telescopes

Richard Paxman, Brian Thelen, Ryan Murphy, Kurt Gleichman, James Georges

Proceedings Volume 6711, 671103 (2007) https://doi.org/10.1117/12.734665

KEYWORDS: Adaptive optics, Wavefront sensors, Data modeling, Telescopes, Wavefronts, Phase retrieval, Turbulence, Sensors, Statistical analysis, Field programmable gate arrays

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Proceedings Article | 27 September 2007 Paper

Automatic calibration of a phase diversity wavefront sensing and control testbed

James Georges, Pam Dorrance, Kurt Gleichman, Julie Jonik, Dean Liskow, Harold Lapprich, Vipul Naik, Stuart Parker, Rick Paxman, Matt Warmuth, Aaron Wilson, Tom Zaugg

Proceedings Volume 6711, 671106 (2007) https://doi.org/10.1117/12.732193

KEYWORDS: Wavefronts, Calibration, Actuators, Fermium, Frequency modulation, Wavefront sensors, Sensors, Control systems, Image processing, Mirrors

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Proceedings Article | 17 November 2000 Paper

Pre- and post-detection correction of turbulence-induced space-variant blur

Brian Thelen, David Carrara, Richard Paxman

Proceedings Volume 4125, (2000) https://doi.org/10.1117/12.409294

KEYWORDS: Adaptive optics, Turbulence, Speckle, Image restoration, Point spread functions, Computer simulations, Image quality, Wavefront sensors, Image processing, Reconstruction algorithms

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Proceedings Article | 16 November 2000 Paper

Aberration correction of segmented-aperture telescopes by using phase diversity

David Carrara, Brian Thelen, Richard Paxman

Proceedings Volume 4123, (2000) https://doi.org/10.1117/12.409286

KEYWORDS: Wavefronts, Image segmentation, Signal to noise ratio, Avalanche photodetectors, Error analysis, Space telescopes, Image processing, Telescopes, Image analysis, Wavefront sensors

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Proceedings Article | 31 October 2000 Paper

Closed-loop wavefront sensing for a sparse-aperture multitelescope array using broadband phase diversity

John Seldin, Richard Paxman, Vassilis Zarifis, Larry Benson, Richard Stone

Proceedings Volume 4091, (2000) https://doi.org/10.1117/12.405804

KEYWORDS: Point spread functions, Telescopes, Wavefronts, Error analysis, Wavefront sensors, Sensors, Imaging systems, Space telescopes, Actuators, Data modeling

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Proceedings Article | 5 October 1999 Paper

Optimal simulation of volume turbulence with phase screens

Richard Paxman, Brian Thelen, Jason Miller

Proceedings Volume 3763, (1999) https://doi.org/10.1117/12.363602

KEYWORDS: Turbulence, Adaptive optics, Wavefronts, Refraction, Atmospheric propagation, Computer simulations, Speckle, Chromium, Astronomy, Device simulation

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Proceedings Article | 5 October 1999 Paper

Fine-resolution imagery of extended objects observed through volume turbulence using phase-diverse speckle

Brian Thelen, David Carrara, Richard Paxman

Proceedings Volume 3763, (1999) https://doi.org/10.1117/12.363605

KEYWORDS: Turbulence, Speckle, Computer simulations, Image restoration, Image processing, Data modeling, Astronomical imaging, Reconstruction algorithms, Point spread functions, Speckle imaging

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Proceedings Article | 30 September 1999 Paper

Deconvolution of narrowband solar images using aberrations estimated from phase-diverse imagery

John Seldin, Richard Paxman, David Carrara, Christoph Keller, Thomas Rimmele

Proceedings Volume 3815, (1999) https://doi.org/10.1117/12.364125

KEYWORDS: Adaptive optics, Image processing, Deconvolution, Speckle, Spectroscopy, Polarimetry, Point spread functions, Cameras, Astronomy, Imaging spectroscopy

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Proceedings Article | 30 September 1999 Paper

3D imaging correlography and coherent image reconstruction

James Fienup, Richard Paxman, Michael Reiley, Brian Thelen

Proceedings Volume 3815, (1999) https://doi.org/10.1117/12.364140

KEYWORDS: Speckle, Phase retrieval, 3D image reconstruction, 3D image processing, Image retrieval, Opacity, Reconstruction algorithms, Fourier transforms, Speckle pattern, Image processing

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Proceedings Article | 3 November 1998 Paper

Multiframe blind deconvolution of infinite-extent objects

William van Kampen, Richard Paxman

Proceedings Volume 3433, (1998) https://doi.org/10.1117/12.330227

KEYWORDS: Deconvolution, Reconstruction algorithms, Speckle, Computer simulations, Turbulence, Imaging systems, Device simulation, Satellite imaging, Satellites, Image processing

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Proceedings Article | 11 September 1998 Paper

Comparison of image reconstruction algorithms using adaptive optics instrumentation

David Tyler, Stephen Ford, Bobby Hunt, Richard Paxman, Michael Roggemann, Janet Rountree, Timothy Schulz, Kathy Schulze, John Seldin, David Sheppard, Bruce Stribling, William van Kampen, Byron Welch

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321659

KEYWORDS: Adaptive optics, Image restoration, Reconstruction algorithms, Turbulence, Optical transfer functions, Image analysis, Telescopes, Deconvolution, Image processing, Imaging systems

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Proceedings Article | 11 September 1998 Paper

Comparison of phase diversity and curvature wavefront sensing

James Fienup, Brian Thelen, Richard Paxman, David Carrara

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321701

KEYWORDS: Wavefront sensors, Wavefronts, Statistical analysis, Error analysis, Optical transfer functions, Analog electronics, Reconstruction algorithms, Adaptive optics, Telescopes, Mirrors

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Proceedings Article | 28 August 1998 Paper

Phase diversity experiment to measure piston misalignment on the segmented primary mirror of the Keck II Telescope

Mats Lofdahl, Rick Kendrick, Alex Harwit, Keith Mitchell, Alan Duncan, John Seldin, Richard Paxman, D. Scott Acton

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324519

KEYWORDS: Wavefronts, Image segmentation, Telescopes, Error analysis, Space telescopes, Turbulence, Mirrors, Sensors, Cameras, Data modeling

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Proceedings Article | 31 October 1997 Paper

Space object identification using phase-diverse speckle

John Seldin, Michael Reiley, Richard Paxman, Bruce Stribling, Brent Ellerbroek, Dustin Johnston

Proceedings Volume 3170, (1997) https://doi.org/10.1117/12.292817

KEYWORDS: Speckle, Space telescopes, Telescopes, Satellites, Atmospheric turbulence, Adaptive optics, Device simulation, Turbulence

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Proceedings Article | 31 October 1997 Paper

3D locator sets of opaque objects for phase retrieval

James Fienup, Brian Thelen, Michael Reiley, Richard Paxman

Proceedings Volume 3170, (1997) https://doi.org/10.1117/12.292818

KEYWORDS: 3D image processing, Opacity, Reconstruction algorithms, Phase retrieval, Heterodyning, Fourier transforms

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Proceedings Article | 31 October 1997 Paper

3D reconstruction of opaque objects from Fourier intensity data

Michael Reiley, Richard Paxman, James Fienup, Kurt Gleichman, Joseph Marron

Proceedings Volume 3170, (1997) https://doi.org/10.1117/12.292830

KEYWORDS: Opacity, Signal detection, 3D modeling, 3D metrology, Stereoscopy, Inspection, 3D acquisition, 3D image processing, Tunable lasers, Sensors

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Proceedings Article | 17 October 1997 Paper

Comparison of Shack-Hartmann wavefront sensing and phase-diverse phase retrieval

Brent Ellerbroek, Brian Thelen, David Lee, David Carrara, Richard Paxman

Proceedings Volume 3126, (1997) https://doi.org/10.1117/12.290157

KEYWORDS: Wavefront sensors, Phase retrieval, Adaptive optics, Sensors, Error analysis, Interference (communication), Statistical analysis, Detection and tracking algorithms, Wavefronts, Photodetectors

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Proceedings Article | 25 November 1996 Paper

Time series restoration from ground-based solar observations

John Seldin, Richard Paxman, Christoph Keller

Proceedings Volume 2804, (1996) https://doi.org/10.1117/12.259712

KEYWORDS: Speckle, Observatories, Wavefront sensors, Spatial resolution, Temporal resolution, Telescopes, Astronomy, Solar processes, Magnetism, Image restoration

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Proceedings Article | 25 October 1996 Paper

Bayes estimation of dynamic and fixed aberrations and object from phase-diverse speckle data

Brian Thelen, Richard Paxman, John Seldin, David Rice

Proceedings Volume 2827, (1996) https://doi.org/10.1117/12.255086

KEYWORDS: Speckle, Stochastic processes, Image restoration, Turbulence, Wavefronts, Speckle imaging, Data modeling, Optimization (mathematics), Calibration, Imaging systems

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Proceedings Article | 30 September 1994 Paper

Parameter dimension of turbulence-induced phase errors and its effects on estimation in phase diversity

Brian Thelen, Richard Paxman

Proceedings Volume 2302, (1994) https://doi.org/10.1117/12.188048

KEYWORDS: Image restoration, Matrices, Data modeling, Error analysis, Phased array optics, Probability theory, Statistical modeling, Point spread functions, Atmospheric turbulence, Astronomy

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Proceedings Article | 30 September 1994 Paper

Phase-diverse speckle reconstruction of solar data

John Seldin, Richard Paxman

Proceedings Volume 2302, (1994) https://doi.org/10.1117/12.188044

KEYWORDS: Speckle, Speckle imaging, Solar telescopes, Lanthanum, Atmospheric turbulence, Image restoration

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Proceedings Article | 8 July 1994 Paper

Pulsed heterodyne-array imaging

Joseph Marron, Richard Paxman

Proceedings Volume 2241, (1994) https://doi.org/10.1117/12.179729

KEYWORDS: 3D image processing, Receivers, Fourier transforms, Stereoscopy, Image acquisition, Image restoration, Reflectivity, Pulsed laser operation, Inverse optics, Mode locking

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Proceedings Article | 8 July 1994 Paper

Use of an opacity constraint in three-dimensional imaging

Richard Paxman, John Seldin, James Fienup, Joseph Marron

Proceedings Volume 2241, (1994) https://doi.org/10.1117/12.179730

KEYWORDS: Opacity, Reflectivity, Phase retrieval, 3D image processing, Inverse optics, Fourier transforms, Scattering, Speckle, Reconstruction algorithms, 3D metrology

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Proceedings Article | 31 May 1994 Paper

Correction of anisoplanatic blur by using phase diversity

Richard Paxman, Brian Thelen, John Seldin

Proceedings Volume 2201, (1994) https://doi.org/10.1117/12.176047

KEYWORDS: Wavefront sensors, Point spread functions, Atmospheric turbulence, Deformable mirrors, Turbulence, Infrared imaging, Infrared radiation, Internet, Geometrical optics, Scattering

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Proceedings Article | 9 November 1993 Paper

Fine-resolution astronomical imaging with phase-diverse speckle

Richard Paxman, John Seldin

Proceedings Volume 2029, (1993) https://doi.org/10.1117/12.162007

KEYWORDS: Speckle imaging, Wavefront sensors, Deconvolution, Data modeling, Image restoration, Speckle, Point spread functions, Sensors, Astronomical imaging, Atmospheric optics

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Proceedings Article | 1 November 1990 Paper

Aberration correction for phased-array telescopes using phase diversity

Richard Paxman, Susan Crippen

Proceedings Volume 1351, (1990) https://doi.org/10.1117/12.23685

KEYWORDS: Aberration correction, Telescopes, Phased array optics, Precision optics, Interferometers, Optical filters, Image filtering, Electronic filtering

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Showing 5 of 31 publications

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