Mr. Donald R. Snyder Profile

Mr. Donald R. Snyder

Fellow at US Air Force Research Laboratory

SPIE Involvement:

Area of Expertise:

Lasers and Electro Optics , Laser Radar , Sniper Detection , UAV , Infrared , Directed Energy

Publications (35)

PROCEEDINGS ARTICLE | May 11, 2012

Development of photonic crystal based large format IR scene projection technology

Proc. SPIE. 8356, Technologies for Synthetic Environments: Hardware-in-the-Loop XVII

KEYWORDS: Mid-IR, Diffractive optical elements, Cameras, Sensors, Tungsten, Photonic crystals, Projection systems, Infrared signatures, Infrared technology, Semiconducting wafers

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PROCEEDINGS ARTICLE | April 24, 2010

Photonic crystal scene projector development

Proc. SPIE. 7663, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing XV

KEYWORDS: Long wavelength infrared, Mid-IR, Short wave infrared radiation, Diffractive optical elements, Cameras, Sensors, Photonic crystals, Projection systems, High dynamic range imaging, Lead

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PROCEEDINGS ARTICLE | April 24, 2010

Power, pulse width, and repetition rate agile low-cost multi-spectral semi-active laser simulator

Proc. SPIE. 7663, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing XV

KEYWORDS: Safety, Signal attenuation, Wavelength division multiplexing, Control systems, Semiconductor lasers, Optical simulations, Servomechanisms, Beam controllers, Light, Diode pumped solid state lasers

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PROCEEDINGS ARTICLE | February 6, 2010

High power VCSELs for miniature optical sensors

Proc. SPIE. 7615, Vertical-Cavity Surface-Emitting Lasers XIV

KEYWORDS: Packaging, Optical sensors, High power lasers, Reliability, Laser applications, Semiconductor lasers, Vertical cavity surface emitting lasers, Semiconducting wafers, Fiber optic illuminators

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PROCEEDINGS ARTICLE | April 16, 2008

Development of photonic crystal-based scene projection technology

Proc. SPIE. 6942, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing XIII

KEYWORDS: Microelectromechanical systems, Mid-IR, Sensors, Crystals, Tungsten, Photonic crystals, Black bodies, Projection systems, Infrared radiation, Photonic crystal devices

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PROCEEDINGS ARTICLE | September 1, 2006

High-power VCSELs for smart munitions

Proc. SPIE. 6287, Optical Technologies for Arming, Safing, Fuzing, and Firing II

KEYWORDS: Target detection, Nano opto mechanical systems, Quantum efficiency, Semiconductor lasers, Photonics, Vertical cavity surface emitting lasers, Analytical research, Pulsed laser operation, Pulsed power, Inductance

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PROCEEDINGS ARTICLE | September 20, 2005

High speed holographic cine-recorder

Proc. SPIE. 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications

KEYWORDS: Mirrors, Holograms, Holography, Cameras, Particles, Image resolution, Interferometry, Diffusers, Analytical research, Holographic interferometry

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SPIE Conference Volume | March 17, 2005

26th International Congress on High-Speed Photography and Photonics

PROCEEDINGS ARTICLE | August 4, 2004

Synthetic IR signature control using emissivity enhancement techniques

Proc. SPIE. 5408, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing IX

KEYWORDS: Semiconductors, Thermography, Infrared imaging, Visible radiation, Germanium, Silicon, Projection systems, Infrared radiation, Infrared signatures, Absorption

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PROCEEDINGS ARTICLE | February 6, 2004

Development of a high-speed ballistic holography camera for field experiments

Proc. SPIE. 5210, Ultrahigh- and High-Speed Photography, Photonics, and Videography

KEYWORDS: Mirrors, Holograms, Holography, 3D image reconstruction, Imaging systems, Cameras, Particles, Digital cameras, Ruby lasers, Holographic interferometry

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SPIE Conference Volume | February 6, 2004

Ultrahigh- and High-Speed Photography, Photonics, and Videography

PROCEEDINGS ARTICLE | September 12, 2003

Semiconductor screen dynamic visible-to-infrared scene converter

Proc. SPIE. 5092, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VIII

KEYWORDS: Semiconductors, Infrared cameras, Thermography, Infrared imaging, Visible radiation, Germanium, Electrons, Projection systems, Infrared radiation, Absorption

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PROCEEDINGS ARTICLE | December 18, 2002

Semiconductor screen dynamic visible-to-infrared scene converter

Proc. SPIE. 4818, Infrared Spaceborne Remote Sensing X

KEYWORDS: Semiconductors, Infrared cameras, Thermography, Infrared imaging, Visible radiation, Germanium, Electrons, Projection systems, Infrared radiation, Absorption

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PROCEEDINGS ARTICLE | July 12, 2002

LADAR scene projector for hardware-in-the-loop testing

Proc. SPIE. 4717, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VII

KEYWORDS: Clocks, LIDAR, Computing systems, Receivers, Semiconductor lasers, Projection systems, Scene simulation, Analog electronics, Digital electronics, Hardware in the loop testing

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PROCEEDINGS ARTICLE | June 22, 2001

Stereo at the speed of light: high-speed digital stereo imaging at up to 100 million frames per second

Proc. SPIE. 4297, Stereoscopic Displays and Virtual Reality Systems VIII

KEYWORDS: Imaging systems, Cameras, Sensors, Particles, Photography, Image resolution, Digital imaging, Charge-coupled devices, Pulsed laser operation, Camera shutters

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PROCEEDINGS ARTICLE | April 17, 2001

Preliminary assessment of electrothermomagnetically loaded composite panel impact resistance/crack propagation with high-speed digital laser photography

Proc. SPIE. 4183, 24th International Congress on High-Speed Photography and Photonics

KEYWORDS: Digital photography, Imaging systems, Cameras, Composites, Photography, Resistance, Ruby lasers, High speed photography, Camera shutters, Radio propagation

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PROCEEDINGS ARTICLE | April 11, 2001

MegaSun illumination for ultrahigh-speed photography

Proc. SPIE. 4308, High-Speed Imaging and Sequence Analysis III

KEYWORDS: Mirrors, Imaging systems, Cameras, Argon, Photography, Lamps, Streak cameras, Explosives, High speed photography, Plasma

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PROCEEDINGS ARTICLE | February 29, 2000

Dynamic ballistic impact events imaged at 500 kHz using laser-based image acquisition

Proc. SPIE. 3968, High-Speed Imaging and Sequence Analysis II

KEYWORDS: Clocks, Imaging systems, Cameras, Image acquisition, Control systems, CCD cameras, Charge-coupled devices, High speed imaging, Ruby lasers, Pulsed laser operation

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PROCEEDINGS ARTICLE | May 17, 1999

Integration of a high-speed repetitively pulsed laser with a high-speed CCD camera

Proc. SPIE. 3642, High-Speed Imaging and Sequence Analysis

KEYWORDS: Imaging systems, Cameras, Photography, Image resolution, CCD cameras, Charge-coupled devices, High speed imaging, Ruby lasers, Pulsed laser operation, Camera shutters

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PROCEEDINGS ARTICLE | December 12, 1997

Megapixel 1000-frame-per-second camera with 1000-frame storage

Proc. SPIE. 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement

KEYWORDS: Weapons, Electronics, Imaging systems, Cameras, Data storage, Silicon, Digital cameras, LCDs, High speed cameras, Camera shutters

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PROCEEDINGS ARTICLE | December 12, 1997

Million-frame-per-second CCD camera with 16 frames of storage

Proc. SPIE. 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement

KEYWORDS: Optical imaging, Weapons, Imaging systems, Cameras, Silicon, Control systems, Image analysis, CCD cameras, Speckle interferometry, Ultrafast imaging

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SPIE Conference Volume | December 12, 1997

Ultrahigh- and High-Speed Photography and Image-based Motion Measurement

PROCEEDINGS ARTICLE | December 12, 1997

Hi-G electronic gated camera for precision trajectory analysis

Proc. SPIE. 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement

KEYWORDS: Imaging systems, Cameras, Sensors, Calibration, Video, Photography, Image sensors, Navigation systems, CCD image sensors, Target designation

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It is extremely difficult and expensive to determine the flight attitude and aimpoint of small maneuvering miniature air vehicles from ground based fixed or tracking photography. Telemetry alone cannot provide sufficient information bandwidth on 'what' the ground tracking is seeing and consequently 'why' it did or did not function properly. Additionally, it is anticipated that 'smart' and 'brilliant' guided vehicles now in development will require a high resolution imaging support system to determine which target and which part of a ground feature is being used for navigation or targeting. Other requirements include support of sub-component separation from developmental supersonic vehicles, where the clean separation from the container is not determinable from ground based film systems and film cameras do not survive vehicle breakup and impact. Hence, the requirement is to develop and demonstrate an imaging support system for development/testing that can provide the flight vehicle developer/analyst with imagery (combined with miniature telemetry sources) sufficient to recreate the trajectory, terminal navigation, and flight termination events. This project is a development and demonstration of a real-time, launch-rated, shuttered, electronic imager, transmitter, and analysis system. This effort demonstrated boresighted imagery from inside small flight vehicles for post flight analysis of trajectory, and capture of ground imagery during random triggered vehicle functions. The initial studies for this capability have been accomplished by the Experimental Dynamics Section of the Air Force Wright Laboratory, Armament Directorate, Eglin AFB, Florida, and the Telemetry Support Branch of the Army Material Research and Development Center at Picatinny Arsenal, New Jersey. It has been determined that at 1/10,000 of a second exposure time, new ultra-miniature CCD sensors have sufficient sensitivity to image key ground target features without blur, thereby providing data for trajectory, timing, and advanced sensor development. This system will be used for ground tracking data reduction in support of small air vehicle and munition testing. It will provide a means of integrating the imagery and telemetry data from the item with ground based photographic support. The technique we have designed will exploit off-the-shelf software and analysis components. A differential GPS survey instrument will establish a photogrammetric calibration grid throughout the range and reference targets along the flight path. Images from the on-board sensor will be used to calibrate the ortho- rectification model in the analysis software. The projectile images will be transmitted and recorded on several tape recorders to insure complete capture of each video field. The images will be combined with a non-linear video editor into a time-correlated record. Each correlated video field will be written to video disk. The files will be converted to DMA compatible format and then analyzed for determination of the projectile altitude, attitude and position in space. The resulting data file will be used to create a photomosaic of the ground the projectile flew over and the targets it saw. The data will be then transformed to a trajectory file and used to generate a graphic overlay that will merge digital photo data of the range with actual images captured. The plan is to superimpose the flight path of the projectile, the path of the weapons aimpoint, and annotation of each internal sequence event. With tools used to produce state-of-the-art computer graphics, we now think it will be possible to reconstruct the test event from the viewpoint of the warhead, the target, and a 'God's-Eye' view looking over the shoulder of the projectile.

PROCEEDINGS ARTICLE | May 28, 1997

1024 x 1024 and 256 x 256 fast framing arrays with progressive scan readout

Proc. SPIE. 2869, 22nd International Congress on High-Speed Photography and Photonics

KEYWORDS: Clocks, Imaging systems, Electrons, Amplifiers, Photodiodes, Control systems, Capacitance, Microlens, Charge-coupled devices, High speed imaging

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SPIE Conference Volume | September 1, 1995

Ultrahigh- and High-Speed Photography, Videography, and Photonics '95

SPIE Conference Volume | October 14, 1994

Ultrahigh- and High-Speed Photography, Videography, and Photonics '94

PROCEEDINGS ARTICLE | August 31, 1993

Effects of intensity thresholding on the power spectrum of laser speckle

Proc. SPIE. 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV

KEYWORDS: Optical filters, Speckle, Sensors, Distortion, Speckle pattern, Monte Carlo methods, Solids, Optical simulations, Laser damage threshold, Modulation transfer functions

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SPIE Journal Paper | February 1, 1993

Modulation transfer function testing of detector arrays using narrow-band laser speckle

Sensiper, Martin , Boreman, Glenn , Ducharme, Alfred , Snyder, Donald

OE Vol. 32 Issue 02

KEYWORDS: Modulation transfer functions, Speckle, Staring arrays, Spatial frequencies, Detector arrays, Imaging systems, Sensors, Integrating spheres, Speckle pattern, Solids

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PROCEEDINGS ARTICLE | January 19, 1993

SMPTE/IRIG composite time code for video instrumentation systems

Proc. SPIE. 1757, Ultrahigh- and High-Speed Photography, Videography, and Photonics

KEYWORDS: Semantic video, Cameras, Video, Composites, Computer programming, Televisions, Connectors, High speed photography, Prototyping, Standards development

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SPIE Conference Volume | January 19, 1993

Ultrahigh- and High-Speed Photography, Videography, and Photonics

PROCEEDINGS ARTICLE | August 12, 1992

Use of narrowband laser speckle for MTF characterization of CCDs

Proc. SPIE. 1683, Infrared Focal Plane Array Producibility and Related Materials

KEYWORDS: Target detection, Imaging systems, Spatial frequencies, Speckle, Cameras, Fourier transforms, Detector arrays, Distance measurement, Charge-coupled devices, Modulation transfer functions

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PROCEEDINGS ARTICLE | January 1, 1992

Characterization of high-speed video systems: tests and analyses

Proc. SPIE. 1539, Ultrahigh- and High-Speed Photography, Videography, and Photonics '91

KEYWORDS: Staring arrays, Optical filters, Clocks, Imaging systems, Spatial frequencies, Cameras, Video, Image resolution, Modulation transfer functions, High speed photography

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PROCEEDINGS ARTICLE | January 1, 1992

In-flight scanning laser sheet flow visualization system

Proc. SPIE. 1539, Ultrahigh- and High-Speed Photography, Videography, and Photonics '91

KEYWORDS: Visualization, Imaging systems, Scattering, Cameras, Aerosols, Video, Light scattering, Laser scattering, CCD cameras, Aerodynamics

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PROCEEDINGS ARTICLE | January 1, 1991

Applications of high-resolution still video cameras to ballistic imaging

Proc. SPIE. 1346, Ultrahigh- and High-Speed Photography, Videography, Photonics, and Velocimetry '90

KEYWORDS: Imaging systems, Cameras, Sensors, Calibration, Video, Computing systems, Image resolution, Photonics, Aerodynamics, Research facilities

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PROCEEDINGS ARTICLE | January 1, 1991

Systems analysis and design for next generation high-speed video systems

Proc. SPIE. 1346, Ultrahigh- and High-Speed Photography, Videography, Photonics, and Velocimetry '90

KEYWORDS: High speed photonics, Imaging systems, Cameras, Sensors, Data storage, Video, Control systems, Head, High speed photography, Solid state electronics

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