diffuse reflectance


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diffuse reflectance

The reflectance of light from a rough or nonpolished surface in which the radiant energy tends to scatter. The angle of reflectance does not equal the angle of incidence.
See also: reflectance
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Baes AU, Bloom PR (1989) Diffuse reflectance and transmission fourier transform infrared (DRIFT) spectroscopy of humic and fulvic acids.
The appearance of positive quartz peaks may be explained by an attempt by the PLS procedure to account for non-linearity in the intensity of the mid-infrared diffuse reflectance spectra due to quartz of varying particle size, but this explanation is purely conjecture.
In this technique, a narrow beam of light illuminates a restricted area on the surface of a sample or a body part, and the diffuse reflectance is measured at several distances from the illumination point (52-57).
Minasny B, Tranter G, McBratney AB, Brough DM, Murphy BW (2009) Regional transferability of mid-infrared diffuse reflectance spectroscopic prediction for soil chemical properties.
To establish the on orbit traceability of the radiometric response of the ABI sensor solar reflective channels, the sun is used to illuminate an on-board diffuse reflectance standard that is sub-entrance pupil for ABI.
Sample specimens were prepared using a BioRad diffuse reflectance attachment in combination with the IR spectrometer.
Islam K, McBratney AB, Singh B (2005) Rapid estimation of soil variability from the convex hull biplot area of topsoil ultra-violet, visible and near-infrared diffuse reflectance spectra.
Expanded view of the second derivative diffuse reflectance NIR spectra of the pulp sample in the selected wavelength regions is shown in Fig.
Near infrared diffuse reflectance for quantitative and qualitative measurement of soluble solids and firmness of delicious and gala apples.
To model the diffuse reflectance spectra of blood any number of relevant mathematical/numerical methods can be used, for instance, Monte-Carlo simulations, Kubelka-Munk theory, Photon diffusion models, etc.
The objective of this study was to investigate the use of NIR diffuse reflectance spectrometry coupled with multivariate data analysis to develop models for predicting MCs of yellow-poplar veneer, and to compare the performance of the models developed using the two regression methods.
For other applications, Spectraflect diffuse reflectance material can be uniformly spray-coated on customer provided substrates.

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