Dr. Charles E. Keffer Profile

Dr. Charles E. Keffer

SPIE Involvement:

Author

Publications (8)

Proceedings Article | 13 September 2007 Paper

Coherent backscatter: measurement of the retroreflective BRDF peak exhibited by several surfaces relevant to ladar applications

Thomas Papetti, William Walker, Charles Keffer, Billy Johnson

Proceedings Volume 6682, 66820E (2007) https://doi.org/10.1117/12.731428

KEYWORDS: Bidirectional reflectance transmission function, Backscatter, Sensors, LIDAR, Scattering, Beam splitters, Reflectivity, Polarization, Silica, Calibration

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Proceedings Article | 4 May 2007 Paper

MRDF and BRDF measurements of low-scatter materials

Thomas Papetti, William Walker, Charles Keffer, Billy Johnson

Proceedings Volume 6550, 65500H (2007) https://doi.org/10.1117/12.718662

KEYWORDS: Bidirectional reflectance transmission function, Sensors, Beam splitters, Reflectivity, Polarization, Calibration, Target detection, LIDAR, Polishing, Optical testing

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Proceedings Article | 4 May 2007 Paper

Advanced measurements optical range (AMOR) ladar test facility

Charles Keffer, Thomas Papetti, Eddie Johnson

Proceedings Volume 6550, 65500E (2007) https://doi.org/10.1117/12.718211

KEYWORDS: LIDAR, Sensors, Mirrors, Missiles, Target detection, Target acquisition, Receivers, Calibration, Signal detection, Data acquisition

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SPIE Journal Paper | 1 May 1996

Design and fabrication of multilayer reflective filters for a Ritchey-Chretien Lyman-alpha telescope

Jungho Park, Muamer Zukic, Michele McColgan, Charles Keffer, Douglas Torr, Richard Hoover

OE, Vol. 35, Issue 05, (May 1996) https://doi.org/10.1117/12.10.1117/1.600684

KEYWORDS: Telescopes, Reflectivity, Mirrors, Optical filters, Reflector telescopes, Space telescopes, Optical instrument design, Reflection, Multilayers, Silicon carbide

Proceedings Article | 16 October 1995 Paper

New diffusive source for far-ultraviolet calibrations

Charles Keffer, Muamer Zukic

Proceedings Volume 2517, (1995) https://doi.org/10.1117/12.224921

KEYWORDS: Calibration, Far ultraviolet, Aerospace engineering, Cameras

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Proceedings Article | 7 September 1994 Paper

X-ray photoelectron spectroscopy depth profiling of oxidized aluminum thin films

Jongmin Kim, Jeffrey Weimer, Muamer Zukic, Charles Keffer, Douglas Torr

Proceedings Volume 2262, (1994) https://doi.org/10.1117/12.185779

KEYWORDS: Aluminum, Oxides, Reflectivity, Thin films, Profiling, Magnesium fluoride, Thin film devices, X-rays, Optical testing, Oxidation

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Proceedings Article | 15 February 1994 Paper

Transparent conductive coatings in the far ultraviolet

Jongmin Kim, Muamer Zukic, Jong Park, Michele McColgan, Charles Keffer, Douglas Torr

Proceedings Volume 2010, (1994) https://doi.org/10.1117/12.168585

KEYWORDS: Coating, Chromium, Metals, Transmittance, Transparent conductive coatings, Resistance, Semiconductors, Magnesium fluoride, Oxides, Absorption

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Proceedings Article | 6 December 1993 Paper

Radiation damage effects in far-ultraviolet filters and substrates

Charles Keffer, Marsha Torr, Muamer Zukic, James Spann, Douglas Torr, Jongmin Kim

Proceedings Volume 2018, (1993) https://doi.org/10.1117/12.165218

KEYWORDS: Optical filters, Magnesium fluoride, Thin films, Transmittance, Radiation effects, Silica, Reflectivity, Multilayers, Absorption, Information operations

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Showing 5 of 8 publications

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