Dr. Don A. Gregory Profile

Dr. Don A. Gregory

Professor of Physics at Univ of Alabama in Huntsville

SPIE Involvement:

Author

Publications (99)

Proceedings Article | 11 March 2024 Presentation + Paper

Electro-optical modulator using tunable III-V semiconductor in nanocavity

Kirtan Dixit, Zachary Houtman, Ella James, Don Gregory

Proceedings Volume 12880, 1288003 (2024) https://doi.org/10.1117/12.3001976

KEYWORDS: Metals, Semiconductors, Gold, Electrooptic modulators, Refractive index, Reflectivity, Group III-V semiconductors, Fabry Perot interferometers, Electrooptics, Plasma

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SPIE Journal Paper | 22 January 2018 Open Access

Digital optical correlator x-ray telescope alignment monitoring system

Tomasz Lis, Jessica Gaskin, John Jasper, Don Gregory

OE, Vol. 57, Issue 01, 013104, (January 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.1.013104

KEYWORDS: Light emitting diodes, Optical correlators, Cameras, Optical alignment, Optical benches, X-ray telescopes, Transform theory, Fourier transforms, Optical engineering, Sensors

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Proceedings Article | 8 September 2017 Paper

Development of multilayer coatings for hard x-ray optics at NASA Marshall Space Flight Center

Danielle Gurgew, David Broadway, Brian Ramsey, Don Gregory

Proceedings Volume 10399, 103991S (2017) https://doi.org/10.1117/12.2274134

KEYWORDS: Multilayers, Optical coatings, Silicon, Tungsten, Hard x-rays, X-ray optics, X-rays, Glasses, Chemical species, Data modeling

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SPIE Journal Paper | 19 June 2015 Open Access

Simplified estimation of the eye’s response to flashing light-emitting diodes

Adam Roberts, Stephanie Medley, Don Gregory, Nilesh Dhote

JBO, Vol. 20, Issue 06, 065005, (June 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.6.065005

KEYWORDS: Light emitting diodes, Eye, Sensors, Calibration, Luminous efficiency, Spectroscopy, Convolution, Biological research, Lamps, Light sources

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SPIE Journal Paper | 17 July 2013 Open Access

Polarization signatures of airborne particulates

Prashant Raman, Kirk Fuller, Don Gregory

OE, Vol. 52, Issue 07, 074106, (July 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.7.074106

KEYWORDS: Polarization, Phase modulation, Polarimetry, Scattering, Aerosols, Atmospheric particles, Atmospheric sensing, Optical engineering, LIDAR, Wave plates

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Proceedings Article | 11 June 2012 Paper

Polarimetric discrimination of atmospheric particulate matter

Prashant Raman, Kirk Fuller, Don Gregory

Proceedings Volume 8364, 83640D (2012) https://doi.org/10.1117/12.950194

KEYWORDS: Polarization, Microscopes, Polarimetry, Reflection, Atmospheric particles, Phase modulation, Scattering, Dielectric polarization, Photography, Atmospheric sensing

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SPIE Journal Paper | 1 October 2011

Differential deposition technique for figure corrections in grazing-incidence x-ray optics

Kiranmayee Kilaru, Don Gregory, Brian Ramsey, Mikhail Gubarev

OE, Vol. 50, Issue 10, 106501, (October 2011) https://doi.org/10.1117/12.10.1117/1.3631851

KEYWORDS: X-ray optics, Coating, X-rays, Mirrors, Image segmentation, Astronomical imaging, Radio optics, X-ray imaging, Astronomy, Nickel

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Proceedings Article | 10 September 2011 Paper

Broadband (UV-VIS-NIR) Mueller matrix polarimeter

Prashant Raman, Kirk Fuller, Don Gregory, Mike Newchurch, John Christy

Proceedings Volume 8160, 816013 (2011) https://doi.org/10.1117/12.893723

KEYWORDS: Polarimetry, Polarization, Wave plates, Optical components, Polysomnography, Calibration, Mueller matrices, Polymethylmethacrylate, Standoff detection, Polarizers

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Proceedings Article | 12 September 2008 Paper

Radiometry of flashing LED sources

Don Gregory, Stephanie Medley, Adam Roberts

Proceedings Volume 7062, 70621B (2008) https://doi.org/10.1117/12.795534

KEYWORDS: Light emitting diodes, Eye, Sensors, Luminous efficiency, Power meters, Convolution, Radiometry, Xenon, Lamps, Silicon

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SPIE Journal Paper | 1 August 2008

Application of type II W-quantum-well diode lasers for high-dynamic-temperature-range infrared scene projection

Thomas Cantey, Gary Ballard, Don Gregory

OE, Vol. 47, Issue 08, 086401, (August 2008) https://doi.org/10.1117/12.10.1117/1.2968247

KEYWORDS: Semiconductor lasers, Infrared radiation, Infrared imaging, Imaging systems, Projection systems, Black bodies, Temperature metrology, Staring arrays, Optical engineering, Infrared technology

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Proceedings Article | 12 May 2008 Paper

Conical nozzles for pulsed laser propulsion

John Sinko, Nilesh Dhote, Jonathan Lassiter, Don Gregory

Proceedings Volume 7005, 70052Q (2008) https://doi.org/10.1117/12.782430

KEYWORDS: Laser propulsion, Curium, Data modeling, Sensors, Laser ablation, Pulsed laser operation, Carbon dioxide lasers, Manufacturing, Plasma, Physics

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Proceedings Article | 12 May 2008 Paper

Critical fluence effects in laser propulsion

John Sinko, Don Gregory

Proceedings Volume 7005, 70051Z (2008) https://doi.org/10.1117/12.782469

KEYWORDS: Plasma, Pulsed laser operation, Curium, Laser ablation, Polymers, Laser propulsion, Signal attenuation, Laser energy, Laser damage threshold, Absorption

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Proceedings Article | 3 April 2008 Paper

Optical detection of formaldehyde

Kira Patty, Don Gregory

Proceedings Volume 6958, 69580N (2008) https://doi.org/10.1117/12.784409

KEYWORDS: Luminescence, Atrial fibrillation, Sensors, Sol-gels, Light emitting diodes, Prototyping, Environmental sensing, Spectroscopy, Statistical analysis, Ultraviolet radiation

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SPIE Journal Paper | 1 April 2008

Fiber modal Michelson interferometers with coherence addressing and heterodyne interrogation

James Kirsch, Brian Jones, John Johnson, Don Gregory

OE, Vol. 47, Issue 04, 044001, (April 2008) https://doi.org/10.1117/12.10.1117/1.2911722

KEYWORDS: Polarization, Polarizers, LCDs, Liquid crystals, Stereoscopic displays, Eye, Glasses, Video, Modulation, Liquids

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SPIE Journal Paper | 1 November 2007

Bidirectional reflectance distribution function measurement of molecular contaminants in the ultraviolet, vacuum ultraviolet, and visible ranges

Kenneth Herren, Don Gregory

OE, Vol. 46, Issue 11, 113601, (November 2007) https://doi.org/10.1117/12.10.1117/1.2802140

KEYWORDS: Mirrors, Bidirectional reflectance transmission function, Contamination, Light scattering, Scattering, Vacuum ultraviolet, Reflectivity, Mie scattering, Ultraviolet radiation, Visible radiation

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Proceedings Article | 11 May 2007 Paper

Optical correlator based pose estimation using a bank of filters and a pose search algorithm

John Outerbridge, Don Gregory

Proceedings Volume 6566, 65660Z (2007) https://doi.org/10.1117/12.721302

KEYWORDS: Image filtering, Optical filters, Optical correlators, Spatial light modulators, Algorithm development, Fourier transforms, 3D modeling, Phase only filters, Image processing, 3D image processing

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SPIE Journal Paper | 1 March 2007

Mie scattering of growing molecular contaminants

Kenneth Herren, Don Gregory

OE, Vol. 46, Issue 03, 033602, (March 2007) https://doi.org/10.1117/12.10.1117/1.2715944

KEYWORDS: Mie scattering, Contamination, Mirrors, Scattering, Light scattering, Refractive index, Refraction, Optical testing, Mineralogy, Optical spheres

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Proceedings Article | 15 June 2006 Paper

Novel in-space manufacturing concepts for the development of large space telescopes

J. Mooney, P. Reardon, D. Gregory, A. Manning, J. Blackmon, T. Howsman, P. Williams, W. Brantley, J. Rakoczy, K. Herren, D. Tucker, A. Sharma

Proceedings Volume 6265, 62652W (2006) https://doi.org/10.1117/12.672255

KEYWORDS: Space telescopes, Mirrors, Glasses, Telescopes, Monochromatic aberrations, Spherical lenses, Optics manufacturing, Optical design, Optical components, Modulation transfer functions

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Proceedings Article | 19 May 2006 Paper

A Keplerian approach to angles-only orbit determination

Patrick Vitarius, Daniel Hahs, Don Gregory

Proceedings Volume 6220, 62200M (2006) https://doi.org/10.1117/12.683828

KEYWORDS: Monte Carlo methods, Mechanics, Error analysis, Motion measurement, Satellites, Physics, 3D metrology, Orbital dynamics, Asteroids, Comets

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Proceedings Article | 10 May 2006 Paper

Optical density measurements in a multiphase cryogenic fluid flow system

Valentin Korman, John Wiley, Don Gregory

Proceedings Volume 6222, 622208 (2006) https://doi.org/10.1117/12.665566

KEYWORDS: Cryogenics, Helium, Sensors, Liquids, Nitrogen, Scattering, Absorbance, Optical testing, Environmental sensing, Rayleigh scattering

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Proceedings Article | 10 May 2006 Paper

Optical slip ring for sensor interface applications

En Hong, Abhishek Krishnamurthy, Don Gregory, Sean Anderson

Proceedings Volume 6222, 62220E (2006) https://doi.org/10.1117/12.667667

KEYWORDS: Sensors, Light emitting diodes, Digital signal processing, Data communications, Signal processing, Signal detection, Electro optical systems, Receivers, Metals, Resistance

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Proceedings Article | 10 May 2006 Paper

Correcting distortion in acoustic sense lines

Patrick Vitarius, Don Gregory, Valentin Korman, John Wiley

Proceedings Volume 6222, 62220T (2006) https://doi.org/10.1117/12.667666

KEYWORDS: Acoustics, Transducers, Fourier transforms, Sensors, Rockets, Signal attenuation, Distortion, Interference (communication), Data modeling, Detection theory

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Proceedings Article | 17 April 2006 Paper

Optical correlation techniques applied to spacecraft docking

John Outerbridge, Don Gregory

Proceedings Volume 6245, 62450H (2006) https://doi.org/10.1117/12.667655

KEYWORDS: Image filtering, Spatial light modulators, Optical correlators, Beam splitters, Wave plates, Space operations, Optical filters, Mirrors, Target recognition, Software development

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Proceedings Article | 4 April 2005 Paper

Slow and fast light in coupled microresonators

Hongrok Chang, David Smith, Kirk Fuller, John Dimmock, Don Gregory, Donald Frazier

Proceedings Volume 5735, (2005) https://doi.org/10.1117/12.601659

KEYWORDS: Resonators, Dispersion, Slow light, Phase shifts, Transparency, Waveguides, Absorption, Transmittance, Radio propagation, Optical resonators

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Proceedings Article | 12 April 2004 Paper

Passive optical methods for helmet tracking in aircraft

Patrick Vitarius, Don Gregory, Denise Morell

Proceedings Volume 5437, (2004) https://doi.org/10.1117/12.543243

KEYWORDS: Sensors, Cameras, Light emitting diodes, Polarization, Head, Diffraction gratings, Optical tracking, Magnetism, Floods, Diodes

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Proceedings Article | 19 November 2001 Paper

Solar thermal plasma chamber

Joseph Bonometti, Donald Buchele, Charles Castle, Don Gregory

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448813

KEYWORDS: Mirrors, Solar concentrators, Sun, Solar thermal energy, Plasma, Reflection, Absorption, Spherical lenses, Solids, Quartz

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SPIE Journal Paper | 1 May 2001

Random facet Fresnel lenses and mirrors

Don Gregory, Guolin Peng

OE, Vol. 40, Issue 05, (May 2001) https://doi.org/10.1117/12.10.1117/1.1355959

KEYWORDS: Mirrors, Diffraction, Fresnel lenses, Spatial coherence, Optical engineering, Geometrical optics, Opacity, Optical components, Lenses, Fourier transforms

SPIE Journal Paper | 1 May 2000

Data reduction via the wavelet transform for the synthesis of the projection-slice filter

Vahid Riasati, Hanying Zhou, Tien-Hsin Chao, Don Gregory

OE, Vol. 39, Issue 05, (May 2000) https://doi.org/10.1117/12.10.1117/1.602489

KEYWORDS: Image filtering, Wavelet transforms, Phase only filters, Image compression, Wavelets, Optical filters, Fourier transforms, Fused deposition modeling, Distortion, Computer simulations

Proceedings Article | 31 March 2000 Paper

Clutter rejection via the wavelet transform for improved target detection using the projection-slice synthetic discriminant function filters

Vahid Riasati, Tien-Hsin Chao, Hanying Zhou, Don Gregory

Proceedings Volume 4043, (2000) https://doi.org/10.1117/12.381593

KEYWORDS: Wavelet transforms, Image filtering, Target detection, Wavelets, Fourier transforms, Optical filters, Chaos, Detection and tracking algorithms, Optical pattern recognition, Object recognition

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Proceedings Article | 9 March 1999 Paper

Calculation of fractal dimension in the presence of nonfractal clutter

Kenneth Herren, Don Gregory

Proceedings Volume 3715, (1999) https://doi.org/10.1117/12.341303

KEYWORDS: Fractal analysis, Wavelets, Wavelet transforms, Image processing, Data storage, Data modeling, Transform theory, Data processing, Clouds, Interference (communication)

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Proceedings Article | 9 March 1999 Paper

Complex spatial light modulators in optical correlators

John McClain, Don Gregory

Proceedings Volume 3715, (1999) https://doi.org/10.1117/12.341294

KEYWORDS: Fourier transforms, Modulation, Optical correlators, Phase shift keying, Computer programming, Glasses, Phase modulation, Convolution, Optical filters, Modulators

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Proceedings Article | 9 March 1999 Paper

CCD/LCD holographic recording and display

Amy Kransteuber, Don Gregory

Proceedings Volume 3715, (1999) https://doi.org/10.1117/12.341297

KEYWORDS: LCDs, Holograms, Holography, Charge-coupled devices, Optical filters, Optical correlators, CCD cameras, Cameras, Fourier transforms, Visibility

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Proceedings Article | 9 March 1999 Paper

Feature extraction with wavelet transforms for implementation of the projection-slice filter

Vahid Riasati, Don Gregory

Proceedings Volume 3715, (1999) https://doi.org/10.1117/12.341307

KEYWORDS: Image filtering, Wavelet transforms, Wavelets, Phase only filters, Fourier transforms, Optical filters, Image compression, Distortion, Feature extraction, Computer simulations

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Proceedings Article | 23 March 1998 Paper

Rotation-invariant projection-slice filter

Vahid Riasati, Partha Banerjee, Mustafa Abushagur, Don Gregory

Proceedings Volume 3386, (1998) https://doi.org/10.1117/12.304768

KEYWORDS: Image filtering, Fourier transforms, Optical filters, Distortion, Optimization (mathematics), Image analysis, Detection and tracking algorithms, Pattern recognition, Digital cameras, Device simulation

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SPIE Journal Paper | 1 January 1998

Optical recognition of phase-encrypted biometrics

Eric Johnson, James Brasher, Don Gregory, Peter Erbach, Michael Duignan, Gregory Behrmann, Sing Lee, Walter Daschner, Pin Long

OE, Vol. 37, Issue 01, (January 1998) https://doi.org/10.1117/12.10.1117/1.601850

KEYWORDS: Photomasks, Biometrics, Lithography, Analog electronics, Wavefronts, CCD image sensors, LCDs, Optical correlators, Optical engineering, Fingerprint recognition

SPIE Journal Paper | 1 January 1998

Soft blocking of the dc term in Fourier optical systems

Suganda Jutamulia, Don Gregory

OE, Vol. 37, Issue 01, (January 1998) https://doi.org/10.1117/12.10.1117/1.601854

KEYWORDS: Diffraction, Fourier transforms, Optical correlators, Europium, Optical signal processing, Signal processing, Joint transforms, Transmittance, Liquid crystals, Signal detection

Proceedings Article | 31 March 1997 Paper

Phase-distortion representation and laser characteristics of ORMOSILs: oscillator/amplifier experiment

Travis Taylor, John Ehrlich, Bruce Dunn, John Harreld, Don Gregory

Proceedings Volume 2986, (1997) https://doi.org/10.1117/12.270006

KEYWORDS: Distortion, Oscillators, Absorption, Dye lasers, Adaptive optics, Correlation function, Optical amplifiers, Refraction, Fourier transforms, Mirrors

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Proceedings Article | 27 March 1997 Paper

Phase-only projection-slice filters for invariant optical pattern recognition

Vahid Riasati, Mustafa Abushagur, Don Gregory

Proceedings Volume 3073, (1997) https://doi.org/10.1117/12.270404

KEYWORDS: Image filtering, Phase only filters, Optical filters, Fourier transforms, Distortion, Optical pattern recognition, Fused deposition modeling, Linear filtering, Tomography, Medical imaging

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Proceedings Article | 27 March 1997 Paper

Turbulence simulation and optical processing through turbulent media

Travis Taylor, Don Gregory, Peter Erbach, T. Michelle Eckstein

Proceedings Volume 3073, (1997) https://doi.org/10.1117/12.270389

KEYWORDS: Turbulence, Phase shift keying, Liquid crystals, Correlation function, Phase modulation, Refraction, Optical signal processing, Spatial light modulators, Computer simulations, Mathematical modeling

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SPIE Journal Paper | 1 April 1996

Spatial light modulator phase depth determination from optical diffraction information

John McClain, Peter Erbach, Don Gregory, Francis Yu

OE, Vol. 35, Issue 04, (April 1996) https://doi.org/10.1117/12.10.1117/1.600704

KEYWORDS: Phase shift keying, Phase modulation, Fourier transforms, Phase measurement, Amplitude modulation, Diffraction, Interferometers, Modulation, Interferometry, Spatial light modulators

Proceedings Article | 22 March 1996 Paper

Image reconstruction with the phase-only wavelet joint transform optical correlator

Peter Erbach, Don Gregory

Proceedings Volume 2762, (1996) https://doi.org/10.1117/12.236032

KEYWORDS: Wavelets, Wavelet transforms, Fourier transforms, Joint transforms, Optical correlators, Image restoration, Spatial frequencies, Spatial light modulators, Bandpass filters, Reconstruction algorithms

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Proceedings Article | 15 March 1996 Paper

Diffractive method for measurement of coupled amplitude and phase modulation in spatial light modulators

John McClain, Peter Erbach, Don Gregory, Francis Yu

Proceedings Volume 2752, (1996) https://doi.org/10.1117/12.235645

KEYWORDS: Amplitude modulation, Phase modulation, Phase shift keying, Fourier transforms, Phase measurement, Interferometry, Modulation, Interferometers, Diffraction, Convolution

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Proceedings Article | 15 March 1996 Paper

Scale invariant optical Mellin-wavelet joint transform correlation

Peter Erbach, Don Gregory

Proceedings Volume 2752, (1996) https://doi.org/10.1117/12.235673

KEYWORDS: Wavelets, Joint transforms, Optical correlators, Fourier transforms, Wavelet transforms, Spatial light modulators, Phase shifts, Optical filters, Image filtering, Radon

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Proceedings Article | 15 March 1996 Paper

Optical processing through turbulent media

Travis Taylor, Amy Kransteuber, Don Gregory, John McClain

Proceedings Volume 2752, (1996) https://doi.org/10.1117/12.235662

KEYWORDS: Turbulence, Distortion, Optical signal processing, Fourier transforms, Phase shift keying, Phase interferometry, Interferometry, Optical correlators, Aluminum, Liquid crystals

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Proceedings Article | 15 March 1996 Paper

Practical considerations for wavelet transforms obtained using a phase-only joint transform optical correlator

Peter Erbach, Don Gregory

Proceedings Volume 2752, (1996) https://doi.org/10.1117/12.235656

KEYWORDS: Wavelets, Fourier transforms, Wavelet transforms, Optical correlators, Joint transforms, Bandpass filters, Spatial frequencies, Image analysis, Spatial light modulators, Computer programming

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SPIE Journal Paper | 1 February 1996

Basic parameters for miniature optical correlators employing spatial light modulators

Xiao Jing Lu, Charles Wrigley, Don Gregory

OE, Vol. 35, Issue 02, (February 1996) https://doi.org/10.1117/12.10.1117/1.600911

KEYWORDS: Optical correlators, Spatial light modulators, Charge-coupled devices, Optical filters, Joint transforms, Fourier transforms, Image filtering, Optical engineering, Optical design, Missiles

Proceedings Article | 18 August 1995 Paper

Nonlinear self-organization of light in photorefractive potassium niobate into hexagonal arrays and applications in optical processing

Partha Banerjee, Hsueh-Lin Yu, Don Gregory, Nickolai Kukhtarev

Proceedings Volume 2529, (1995) https://doi.org/10.1117/12.217013

KEYWORDS: Crystals, Phase conjugation, Fourier transforms, Laser crystals, Transparency, Holograms, Nonlinear optics, Image enhancement, Potassium, Optical signal processing

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SPIE Journal Paper | 1 August 1995

Diffused matched filter storage in photorefractive optical materials

Deanna McMillen, Cynthia Zabel, Peter Erbach, Don Gregory

OE, Vol. 34, Issue 08, (August 1995) https://doi.org/10.1117/12.10.1117/12.210716

KEYWORDS: Optical filters, Optical storage

Proceedings Article | 16 June 1995 Paper

Rectangular pixel-based fractal diffraction patterns

Matthew Smith, Don Gregory

Proceedings Volume 2488, (1995) https://doi.org/10.1117/12.211984

KEYWORDS: Fractal analysis, Fourier transforms, Diffraction, Stars, Far-field diffraction, Spatial light modulators, Physics, Data processing, Optical signal processing, Optically addressed spatial light modulators

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Proceedings Article | 16 June 1995 Paper

Optically addressed SLM-based holographic display

Melissa Thie, Jeffrey Lukins, Don Gregory

Proceedings Volume 2488, (1995) https://doi.org/10.1117/12.211990

KEYWORDS: Spatial light modulators, Holograms, Mirrors, Adaptive optics, Holography, Modulators, Liquid crystals, Binary data, Optical components, Diffraction

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Proceedings Article | 6 April 1995 Paper

Novel technique for performing optical wavelet transforms

Peter Erbach, Don Gregory

Proceedings Volume 2491, (1995) https://doi.org/10.1117/12.205462

KEYWORDS: Wavelets, Optical correlators, Wavelet transforms, Joint transforms, Spatial light modulators, Spatial frequencies, Televisions, Image analysis, Fourier transforms, Liquid crystals

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Proceedings Article | 28 March 1995 Paper

Near-infrared excitonic absorption as a phase modulator mechanism

Daniel Northem, Su-Keng Chiou, Don Gregory

Proceedings Volume 2490, (1995) https://doi.org/10.1117/12.205805

KEYWORDS: Absorption, Excitons, Electrons, Phase shifts, Modulators, Beam shaping, Gallium arsenide, Superlattices, Structural design, Spatial light modulators

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Proceedings Article | 28 March 1995 Paper

Clutter reduction and target detection enhancement using wavelet transform techniques

Xiangyang Yang, Don Gregory, Peter Erbach

Proceedings Volume 2490, (1995) https://doi.org/10.1117/12.205767

KEYWORDS: Wavelets, Target detection, Time-frequency analysis, Associative arrays, Optical correlators, Signal processing, Chemical species, Wavelet transforms, Feature extraction, Fourier transforms

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Proceedings Article | 28 March 1995 Paper

Phase encoded versus intensity encoded inputs to optical correlators

John McClain, Don Gregory

Proceedings Volume 2490, (1995) https://doi.org/10.1117/12.205802

KEYWORDS: Fourier transforms, Optical correlators, Spatial light modulators, Polymer optical fibers, Phase only filters, Chemical elements, Televisions, Modulation, Phase shift keying, Liquid crystals

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Proceedings Article | 28 March 1995 Paper

Phase modulation characteristics of rewritable magneto-optic compact disks

Travis Taylor, T. Michelle Eckstein, John Ehrlich, Don Gregory

Proceedings Volume 2490, (1995) https://doi.org/10.1117/12.205798

KEYWORDS: Phase modulation, Polarization, Joint transforms, Optical correlators, Spatial light modulators, Cameras, CCD cameras, Optics manufacturing, Semiconductor lasers, Compact discs

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SPIE Journal Paper | 1 July 1994

Wavelet transform applied to synthetic aperture radar - optical implementation and adaptive techniques

Mohan Sanghadasa, Peter Erbach, Chi Sung, Don Gregory, William Friday

OE, Vol. 33, Issue 07, (July 1994) https://doi.org/10.1117/12.10.1117/12.172241

KEYWORDS: Wavelets, Wavelet transforms, Synthetic aperture radar, Adaptive optics, Signal processing, Electronic filtering, Filtering (signal processing), Fourier transforms, Image filtering, Spatial frequencies

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Proceedings Article | 1 June 1994 Paper

Passive optical target range finder

John Johnson, Melissa Thie, R. Jetton, Don Gregory

Proceedings Volume 2238, (1994) https://doi.org/10.1117/12.177725

KEYWORDS: Cameras, Video, Acousto-optics, Modulation, Adaptive optics, Charge-coupled devices, Crystals, Amplifiers, Imaging systems, Composites

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Proceedings Article | 15 March 1994 Paper

Application of wavelet transform to synthetic aperture radar and its optical implementation

Mohan Sanghadasa, Peter Erbach, Chi Sung, Don Gregory, William Friday

Proceedings Volume 2242, (1994) https://doi.org/10.1117/12.170038

KEYWORDS: Wavelets, Wavelet transforms, Synthetic aperture radar, Signal processing, Fourier transforms, Electronic filtering, Televisions, Spatial frequencies, Spatial light modulators, Motion analysis

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Proceedings Article | 1 March 1994 Paper

Evaluation of the InFocus TVT-6000 LCTV

Jason Duffey, Brian Jones, Don Gregory, John McClain

Proceedings Volume 2237, (1994) https://doi.org/10.1117/12.169426

KEYWORDS: Video, LCDs, Projection systems, Interferometers, Wavefronts, Optical pattern recognition, Televisions, Modulators, Phase shifts, Optical correlators

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Proceedings Article | 1 March 1994 Paper

Optical correlation noise reduction: experimental techniques

W. Michael Crowe, Anthony Hanson, Don Gregory

Proceedings Volume 2237, (1994) https://doi.org/10.1117/12.169450

KEYWORDS: Image filtering, Fourier transforms, Electronic filtering, Optical filters, Optical correlators, Signal to noise ratio, Optical pattern recognition, Target recognition, Denoising, Sensors

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Proceedings Article | 1 March 1994 Paper

Joint transform correlator utilizing rewriteable magneto-optic compact disks as input spatial light modulators

Travis Taylor, Debbee Jordan, Don Gregory, Suganda Jutamulia

Proceedings Volume 2237, (1994) https://doi.org/10.1117/12.169453

KEYWORDS: Joint transforms, Optical correlators, Magneto-optics, Compact discs, Hybrid optics, Optical pattern recognition, Cameras, Optical discs, Aluminum, Ions

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Proceedings Article | 25 October 1993 Paper

Polarization characterization of an LCTV with a Mueller matrix imaging polarimeter

J. Larry Pezzaniti, Russell Chipman, Don Gregory

Proceedings Volume 1959, (1993) https://doi.org/10.1117/12.160319

KEYWORDS: Polarization, Polarimetry, Point spread functions, Charge-coupled devices, Wave plates, Optical pattern recognition, Imaging systems, Sensors, Mueller matrices, Signal detection

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Proceedings Article | 25 October 1993 Paper

Off-axis joint transform correlator

Tracy Hudson, Don Gregory

Proceedings Volume 1959, (1993) https://doi.org/10.1117/12.160310

KEYWORDS: Spatial light modulators, Joint transforms, Optical correlators, Modulators, Photography, Fourier transforms, Optical pattern recognition, Collimation, Lithium, Polymers

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Proceedings Article | 12 July 1993 Paper

Polychromatic neurocomputing

Francis Yu, Xiangyang Yang, Don Gregory

Proceedings Volume 1806, (1993) https://doi.org/10.1117/12.147839

KEYWORDS: Liquid crystals, Neural networks, Signal detection, RGB color model, Optical computing, Televisions, Detection and tracking algorithms, Detector arrays, Optical pattern recognition, Spatial light modulators

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SPIE Journal Paper | 1 March 1993

Phase modulation depth for a real-time kinoform using a liquid crystal television

Aris Tanone, Zheng Zhang, Chii-Maw Uang, Francis Yu, Don Gregory

OE, Vol. 32, Issue 03, (March 1993) https://doi.org/10.1117/12.10.1117/12.61038

KEYWORDS: Computer generated holography, Phase modulation, Liquid crystals, Phase shift keying, Modulation, Televisions, Quantization, Diffraction, Holograms, Wavefronts

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Proceedings Article | 12 January 1993 Paper

Optimization of joint transform correlation

Dong Yu, Don Gregory

Proceedings Volume 1772, (1993) https://doi.org/10.1117/12.140899

KEYWORDS: Joint transforms, Fourier transforms, Optical correlators, Optical filters, Computer simulations, Image filtering, Interference (communication), Diffraction, Sensors, Optical signal processing

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Proceedings Article | 1 July 1992 Paper

Operational considerations for pattern recognition demonstration for transition of optical processing to systems (TOPS)

Charles Hester, Mark Temmen, James Brasher, Jason Kinser, J. DeWitt, Don Gregory

Proceedings Volume 1701, (1992) https://doi.org/10.1117/12.138328

KEYWORDS: Optical pattern recognition, Pattern recognition, Optical correlators, Spatial light modulators, Optical signal processing, Sensors, Target recognition, Optical filters, Control systems, Missiles

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Proceedings Article | 1 July 1992 Paper

Test target for optical correlators

Mustafa Abushagur, Don Gregory, James Kirsch

Proceedings Volume 1701, (1992) https://doi.org/10.1117/12.138319

KEYWORDS: Optical correlators, Optical testing, Spatial frequencies, Stars, Image filtering, Computer simulations, Optical pattern recognition, Target recognition, Binary data, Phase only filters

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Proceedings Article | 1 July 1992 Paper

Joint transform correlator employing electron trapping materials

Dong Yu, George Storti, Don Gregory

Proceedings Volume 1701, (1992) https://doi.org/10.1117/12.138316

KEYWORDS: Optical correlators, Joint transforms, Spatial light modulators, Signal detection, Sensors, Fourier transforms, Visible radiation, Modulation, Infrared radiation, Thin films

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Proceedings Article | 1 July 1992 Paper

Investigation of phase-encoded inputs to VanderLugt correlators

James Kirsch, Melissa Thie, Brian Jones, Don Gregory

Proceedings Volume 1701, (1992) https://doi.org/10.1117/12.138322

KEYWORDS: Optical correlators, Optical filters, Computer programming, Fourier transforms, Modulation, Spatial frequencies, Video, Cameras, Phase only filters, Modulators

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SPIE Journal Paper | 1 May 1992

Modulation characteristics of the Epson liquid crystal television

James Kirsch, Don Gregory, Melissa Thie, Brian Jones

OE, Vol. 31, Issue 05, (May 1992) https://doi.org/10.1117/12.10.1117/12.56170

KEYWORDS: Video, LCDs, Projection systems, Liquid crystals, Televisions, Visibility, Modulation, Polarization, Photography, Phase shift keying

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Proceedings Article | 1 April 1992 Paper

Optical correlators: current capabilities and requirements

James Kirsch, Don Gregory

Proceedings Volume 10262, 1026207 (1992) https://doi.org/10.1117/12.59851

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Proceedings Article | 11 November 1991 Paper

Hybrid modulation properties of the Epson LCTV

James Kirsch, Jeffrey Loudin, Don Gregory

Proceedings Volume 1558, (1991) https://doi.org/10.1117/12.49649

KEYWORDS: LCDs, Modulation, Projection systems, Video, Visibility, Optical filters, Televisions, Optical correlators, Phase shift keying, Polarization

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Proceedings Article | 11 November 1991 Paper

Polychromatic neural networks

Francis Yu, Xiangyang Yang, Don Gregory

Proceedings Volume 1558, (1991) https://doi.org/10.1117/12.49651

KEYWORDS: Neural networks, RGB color model, Liquid crystals, Signal detection, Televisions, Wave propagation, Scattering, Computer simulations, Missiles, Optical pattern recognition

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Proceedings Article | 1 November 1991 Paper

Optical correlator field test results

Tracy Hudson, Don Gregory, James Kirsch, Jeffrey Loudin, W. Michael Crowe

Proceedings Volume 1564, (1991) https://doi.org/10.1117/12.49696

KEYWORDS: Optical correlators, Optical filters, Cameras, Video, Missiles, Control systems, Optical signal processing, Photography, Solids, Target designation

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Proceedings Article | 1 September 1991 Paper

Comparison of optically addressed spatial light modulators

Tracy Hudson, James Kirsch, Don Gregory

Proceedings Volume 1474, (1991) https://doi.org/10.1117/12.44914

KEYWORDS: Spatial light modulators, Modulators, Visibility, Liquid crystals, Image resolution, Signal processing, Time metrology, Ferroelectric LCDs, Modulation, Collimation

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Proceedings Article | 1 September 1991 Paper

Application of the phase and amplitude modulating properties of LCTVs

James Kirsch, Jeffrey Loudin, Don Gregory

Proceedings Volume 1474, (1991) https://doi.org/10.1117/12.44913

KEYWORDS: Optical correlators, Modulation, Visibility, Optical filters, Liquid crystals, Televisions, Video, Spatial light modulators, Phase shift keying, Projection systems

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Proceedings Article | 1 August 1991 Paper

Building an optical pattern recognizer

Perry Lindberg, Don Gregory

Proceedings Volume 1470, (1991) https://doi.org/10.1117/12.44853

KEYWORDS: Optical correlators, Missiles, Optical filters, Sensors, Target recognition, Spatial light modulators, Relays, Video, Optical pattern recognition, Weapons

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Proceedings Article | 1 August 1991 Paper

Optical correlator field demonstration

James Kirsch, Don Gregory, Tracy Hudson, Jeffrey Loudin, W. Michael Crowe

Proceedings Volume 1482, (1991) https://doi.org/10.1117/12.45686

KEYWORDS: Optical correlators, Optical filters, Cameras, Video, Missiles, Control systems, Solids, Target designation, Target acquisition, Photography

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SPIE Journal Paper | 1 February 1991

Infrared signal processing using a liquid crystal television

Suganda Jutamulia, George Storti, William Seiderman, Joseph Lindmayer, Don Gregory

OE, Vol. 30, Issue 02, (February 1991) https://doi.org/10.1117/12.10.1117/12.55785

KEYWORDS: Liquid crystals, Infrared imaging, Modulation, Optical correlators, Video, Polarizers, Infrared radiation, Televisions, Scene simulation, Visible radiation

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