Dr. Roger J. Combs Profile

Dr. Roger J. Combs

Chemist at Research and Technology Consultants

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 25 October 2006 Paper

Gas-cell measurements for evaluating longwave-infrared passive-sensor performance

Alan Cummings, Roger Combs, Mark Thomas, Timothy Curry, Robert Kroutil

Proceedings Volume 6378, 63780M (2006) https://doi.org/10.1117/12.675961

KEYWORDS: Absorbance, Chlorine, Spectroscopy, FT-IR spectroscopy, Black bodies, Long wavelength infrared, Temperature metrology, Nitrogen, Interferometers, Solids

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Proceedings Article | 4 May 2006 Paper

Airborne mapping of chemical plumes in the aftermath of Hurricanes Katrina and Rita

Paul Lewis, Mark Thomas, Robert Kroutil, Roger Combs, Alan Cummings, Dave Miller, Tim Curry, Sylvia Shen

Proceedings Volume 6233, 62331X (2006) https://doi.org/10.1117/12.669802

KEYWORDS: Sensors, Infrared radiation, Spectroscopy, Infrared imaging, Infrared sensors, FT-IR spectroscopy, Infrared spectroscopy, Optical filters, Industrial chemicals, Imaging systems

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Proceedings Article | 10 November 2005 Paper

A purged-gas containment cell for infrared absorbance measurements

Roger Combs, Alan Cummings, Mark Thomas, Robert Kroutil

Proceedings Volume 5994, 59940S (2005) https://doi.org/10.1117/12.629757

KEYWORDS: Absorbance, Black bodies, Spectrometers, FT-IR spectroscopy, Solids, Infrared radiation, Statistical analysis, Absorption, Methane, Nitrogen

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Proceedings Article | 1 June 2005 Paper

A portable vapor cell for passive FT-IR spectrometer evaluation

Roger Combs, Alan Cummings, Mark Thomas, Robert Kroutil

Proceedings Volume 5806, (2005) https://doi.org/10.1117/12.605272

KEYWORDS: Absorbance, Spectroscopy, FT-IR spectroscopy, Black bodies, Infrared spectroscopy, Binary data, Temperature metrology, Signal to noise ratio, Liquids, Sensors

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Proceedings Article | 16 December 2004 Paper

Infrared spectral evaluation of methanol/ammonia vapor mixtures

Paul Field, Roger Combs

Proceedings Volume 5585, (2004) https://doi.org/10.1117/12.565164

KEYWORDS: Absorbance, Binary data, Earth Viewing Camera, Liquids, Infrared radiation, Long wavelength infrared, Solids, Lawrencium, Infrared sensors, Sensors

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Proceedings Article | 8 March 2004 Paper

Vapor mixture generation for infrared sensor evaluation

Paul Field, Roger Combs

Proceedings Volume 5269, (2004) https://doi.org/10.1117/12.515344

KEYWORDS: Infrared sensors, Liquids, Bioalcohols, Infrared radiation, Water, Infrared spectroscopy, Spectroscopy, Target acquisition, Binary data

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Proceedings Article | 2 August 2002 Paper

Infrared detection and analysis of vapor plumes using an airborne sensor

Mark Thomas, Paul Lewis, Robert Kroutil, Roger Combs, Gary Small, Randall Zywicki, Dale Stageberg, Charles Chaffin, Timothy Marshall

Proceedings Volume 4725, (2002) https://doi.org/10.1117/12.478784

KEYWORDS: FT-IR spectroscopy, Infrared imaging, Infrared detection, Infrared sensors, Sensors, Infrared spectroscopy, Spectroscopy, Hyperspectral imaging, Infrared radiation, Surveillance

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Proceedings Article | 22 February 2002 Paper

Airborne passive FT-IR spectrometry

Robert Kroutil, Roger Combs, Robert Knapp, Gary Small

Proceedings Volume 4577, (2002) https://doi.org/10.1117/12.455739

KEYWORDS: Spectroscopy, Bioalcohols, Sensors, Optical filters, FT-IR spectroscopy, Digital filtering, Infrared signatures, Target detection, Infrared spectroscopy, Signal processing

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Proceedings Article | 22 February 2002 Paper

Continuous internal response calibration for FT-IR spectrometry

Roger Combs, Christopher Manning

Proceedings Volume 4577, (2002) https://doi.org/10.1117/12.455731

KEYWORDS: Sensors, Light emitting diodes, Spectroscopy, Digital signal processing, FT-IR spectroscopy, Signal detection, Modulation, Calibration, Digital filtering, Temperature metrology

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Proceedings Article | 22 February 2002 Paper

Ground-based passive FT-IR spectrometry

Robert Knapp, Roger Combs, Robert Kroutil

Proceedings Volume 4577, (2002) https://doi.org/10.1117/12.455745

KEYWORDS: Absorbance, Spectroscopy, Sensors, Sulfur, Nitrous oxide, Long wavelength infrared, Bioalcohols, Transmittance, Mid-IR, Black bodies

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Proceedings Article | 22 February 2002 Paper

FT-IR interferogram signal processing for uniform-time sampling

Christopher Manning, Roger Combs

Proceedings Volume 4577, (2002) https://doi.org/10.1117/12.455729

KEYWORDS: Signal processing, Digital signal processing, FT-IR spectroscopy, Mirrors, Interferometers, Spectroscopy, Sensors, Data processing, Laser processing, Infrared spectroscopy

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Proceedings Article | 23 November 1999 Paper

Radiometric linearity in passive FTIR spectrometry

Robert Kroutil, Roger Combs, Robert Knapp

Proceedings Volume 3856, (1999) https://doi.org/10.1117/12.371301

KEYWORDS: Black bodies, FT-IR spectroscopy, Spectrometers, Bioalcohols, Absorbance, Transmittance, Spectroscopy, Electro optical modeling, Thermal modeling, Systems modeling

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Proceedings Article | 26 February 1999 Paper

FT-IR interferogram sampling validation and correction

Christopher Manning, Roger Combs

Proceedings Volume 3537, (1999) https://doi.org/10.1117/12.341031

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Proceedings Article | 26 February 1999 Paper

Diagnostic computer program for FT-IR spectrometry

Robert Kroutil, Roger Combs, Robert Knapp

Proceedings Volume 3537, (1999) https://doi.org/10.1117/12.341032

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Proceedings Article | 6 August 1998 Paper

Signal processing strategies for passive FT-IR sensors

Ronald Shaffer, Roger Combs

Proceedings Volume 3383, (1998) https://doi.org/10.1117/12.317639

KEYWORDS: Data modeling, Filtering (signal processing), Calibration, Bioalcohols, Optical filters, Clouds, Signal processing, Sensors, Terbium, FT-IR spectroscopy

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Proceedings Article | 6 August 1998 Paper

Noise assessment for passive FT-IR spectrometer measurements

Roger Combs

Proceedings Volume 3383, (1998) https://doi.org/10.1117/12.317638

KEYWORDS: Spectroscopy, Mirrors, Interferometers, Absorbance, FT-IR spectroscopy, Spectral resolution, Black bodies, Infrared spectroscopy, Temperature metrology, Thermal effects

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Proceedings Article | 23 July 1997 Paper

Internal diagnostics for FT-IR spectrometry

Jo Ann Simonds, William Costello, Roger Combs, Robert Kroutil

Proceedings Volume 3082, (1997) https://doi.org/10.1117/12.280922

KEYWORDS: Spectroscopy, Black bodies, Absorbance, Infrared spectroscopy, FT-IR spectroscopy, Diagnostics, Collimators, Temperature metrology, Fourier transforms, Systems modeling

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Proceedings Article | 17 June 1996 Paper

Infrared interferogram analysis for ammonia detection with passive FTIR spectrometry

Robert Kroutil, Roger Combs, Robert Knapp, J. Godfrey

Proceedings Volume 2763, (1996) https://doi.org/10.1117/12.243270

KEYWORDS: Digital filtering, Spectroscopy, Optical filters, Pattern recognition, Signal to noise ratio, FT-IR spectroscopy, Black bodies, Infrared radiation, Infrared spectroscopy, Signal attenuation

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Proceedings Article | 31 May 1995 Paper

Passive Fourier transform infrared (FTIR) monitoring of SO2 in smokestack plumes: a comparison of remote passive spectra of an actual hot plume with emission spectra collected with a heatable cell

Charles Chaffin, Timothy Marshall, Roger Combs, Robert Knapp, Robert Kroutil, William Fateley, Robert Hammaker

Proceedings Volume 2365, (1995) https://doi.org/10.1117/12.210804

KEYWORDS: Sulfur, Spectroscopy, FT-IR spectroscopy, Data modeling, Atmospheric modeling, Infrared radiation, Infrared signatures, Instrument modeling, Sensors, Nitrogen

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Proceedings Article | 31 January 1994 Paper

Remote infrared vapor detection of volatile organic compounds

Robert Kroutil, Roger Combs, Robert Knapp, Gary Small

Proceedings Volume 2089, (1994) https://doi.org/10.1117/12.166745

KEYWORDS: Spectroscopy, Digital filtering, Optical filters, Infrared spectroscopy, Fourier transforms, Sensors, Target detection, Infrared detectors, Infrared radiation, FT-IR spectroscopy

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