Dr. David Leslie Jordan Profile

Dr. David Leslie Jordan

at QinetiQ Ltd

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 12 October 2005 Paper

Real-time polarimetric imager

David Jordan, Greg Innes, David Huckridge, Daniel Hayter

Proceedings Volume 5987, 598704 (2005) https://doi.org/10.1117/12.629157

KEYWORDS: Sensors, Polarimetry, Polarization, Polarizers, Cameras, Target detection, Wave plates, Calibration, Near infrared, Electro optics

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Proceedings Article | 6 December 2004 Paper

Novel speckle technique for underwater imaging

David Jordan, Greg Innes, D. Hayter

Proceedings Volume 5612, (2004) https://doi.org/10.1117/12.581044

KEYWORDS: Particles, Target detection, Polarization, Speckle pattern, Sensors, Speckle, Light scattering, Scattering, Underwater imaging, Absorption

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SPIE Journal Paper | 1 May 2002

Polarized directional reflectance from laurel and mullein leaves

Peter Raven, David Jordan, Catherine Smith

OE, Vol. 41, Issue 05, (May 2002) https://doi.org/10.1117/12.10.1117/1.1467668

KEYWORDS: Reflectivity, Bidirectional reflectance transmission function, Polarization, High dynamic range imaging, Polarimetry, Absorption, Scattering, Backscatter, Multiple scattering, Optical engineering

Proceedings Article | 15 November 2000 Paper

Polarized bidirectional reflectance from leaves in the visible and infrared

Catherine Smith, Peter Raven, David Jordan

Proceedings Volume 4133, (2000) https://doi.org/10.1117/12.406616

KEYWORDS: Reflectivity, Bidirectional reflectance transmission function, Absorption, Polarization, Scattering, Backscatter, Visible radiation, Remote sensing, Polarimetry, Sensors

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The incorporation of polarisation sensitive optics offers considerable potential for improving the utility of remote sensing imaging systems operating within the visible or infrared wavebands. Systems now exist allowing measurement of the four components of Stokes vector arising from each pixel in the image. In order to develop the interpretation of polarimetric images, knowledge is required of the polarised directional reflectance properties of the materials in the scene, which determine the radiation reaching the sensor. Natural vegetation forms a significant element of many scenes observed with remote sensing systems. Although the size of a leaf may be below the spatial resolution of a system, the reflectance properties of individual leaves will affect the polarimetric data observed. This paper will report the results of measurements of the linear polarised bidirectional reflectance distribution function (BRDF) from two examples of leaves. The polarimetric properties of the directional reflectance from an individual leaf will depend on the surface and volume scattering properties. We report data on two leaves representing extreme cases of the leaf structure. Laurel (prunus laurecatious) has a nacreous surface creating a gloss finish to the leaf. Mullein (verbascum thapsus) has a highly pubescent surface, creating a highly diffuse surface reflectance. Measurements of the linear polarisation BRDF are reported at 632.8nm, 1064nm, 3.39pm and 10.6µm as a function of the polar scatter angles. These wavelengths characterise the polarised reflectance from the leaves under different conditions of absorption and scattering. In both cases the body of the leaf acts a highly diffuse reflector through multiple scattering, but this mechanism is only important when the absorption by the leaf constituents is low. In the spectral regions of moderate and high absorption the surface reflectance dominates. In the case of laurel the surface is relatively smooth, with an associated Brewster angle, whereas the data suggests the layer of hair covering a mullein leaf acts as an array of scattering sources.

Proceedings Article | 25 October 1999 Paper

Comparison of visible and infrared backscattering Mueller matrices from roughened aluminum surfaces

Gareth Lewis, David Jordan, Scott Niven

Proceedings Volume 3754, (1999) https://doi.org/10.1117/12.366336

KEYWORDS: Backscatter, Aluminum, Mueller matrices, Polarization, Infrared radiation, Visible radiation, Scattering, Light scattering, Microwave radiation, Sensors

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Proceedings Article | 3 October 1997 Paper

Backscattering Mueller matrices from bead-blasted aluminium surfaces

Gareth Lewis, David Jordan

Proceedings Volume 3121, (1997) https://doi.org/10.1117/12.283874

KEYWORDS: Aluminum, Backscatter, Polarization, Profilometers, Polarizers, Wave plates, Scattering, Mueller matrices, Sensors, Surface roughness

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Proceedings Article | 17 June 1996 Paper

Geometrical dart infrared polarization signatures

David Jordan, Gareth Lewis

Proceedings Volume 2742, (1996) https://doi.org/10.1117/12.243008

KEYWORDS: Polarization, Imaging systems, Polarizers, Reflection, Infrared signatures, Thermography, Modulation, Refractive index, Aluminum, Infrared radiation

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Proceedings Article | 20 June 1995 Paper

Plastic mine polarization signatures

David Jordan, Gareth Lewis

Proceedings Volume 2496, (1995) https://doi.org/10.1117/12.211383

KEYWORDS: Polarization, Refractive index, Reflection, Mining, Thermography, Infrared radiation, Ellipsometry, Reflectivity, Vegetation, Sensors

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SPIE Journal Paper | 1 April 1994

Backscattering from particulate surfaces: experiment and theoretical modeling

Jose Saiz, Pedro Valle, Francisco Gonzalez, Fernando Moreno, David Jordan

OE, Vol. 33, Issue 04, (April 1994) https://doi.org/10.1117/12.10.1117/12.163137

KEYWORDS: Particles, Polarization, Scattering, Backscatter, Light scattering, Electromagnetic scattering, Gold, Mie scattering, Radar, Electromagnetic radiation

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Showing 5 of 9 publications

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