Journal ArticleDOI
Determining the optical properties of turbid media by using the adding–doubling method
TLDR
A method is described for finding the optical properties of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements and the intrinsic error in the method is < 3% when four quadrature points are used.Abstract:
A method is described for finding the optical properties (scattering, absorption, and scattering anisotropy) of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements. This method is applicable to homogeneous turbid slabs with any optical thickness, albedo, or phase function. The slab may have a different index of refraction from its surroundings and may or may not be bounded by glass. The optical properties are obtained by iterating an adding–doubling solution of the radiative transport equation until the calculated values of the reflection and transmission match the measured ones. Exhaustive numerical tests show that the intrinsic error in the method is <3% when four quadrature points are used.read more
Citations
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Journal ArticleDOI
Random laser as a potential tool for the determination of the scattering coefficient
Martin Hohmann,Moritz Späth,Dongqin Ni,Dominique Dörner,Benjamin Lengenfelder,Florian Klämpfl,Michael Schmidt +6 more
TL;DR: Evidence is found that it is possible to determine µ s in the diffusive regime by means of the random laser - and not μ s ' - and a local model of the RL is developed and presented.
Proceedings ArticleDOI
Effects of scattering particle concentration on light propagation through turbid media
TL;DR: In this paper, an experimental study and computer simulation of light propagation in turbid media with different concentration of scattering particles are described. But the experimental results have shown existing of transmittance and reflectance saturation in dependence on volume fraction of the scatterers.
Hyperspectral imaging-based spatially-resolved technique for accurate measurement of the optical properties of horticultural products
TL;DR: In this paper, the authors developed and optimized hyperspectral imaging-based spatially-resolved technique for accurate measurement of the optical properties of horticultural products, such as peaches and apples.
Journal ArticleDOI
Bridging the gap between measurement-based and simulation-based metamodels for deriving bulk optical properties from spatially-resolved reflectance profiles: effect of illumination and detection geometry.
TL;DR: In this paper, the mismatches between measurements and simulations were explored by studying the influences from light source and the incident and detection angle on the diffuse reflectance profiles, and a simulation-based metamodel with a wide range of desired optical properties that is applicable to different measurement configurations was constructed.
Proceedings ArticleDOI
Monte Carlo modeling of photon transport in buried bone tissue layer for quantitative Raman spectroscopy
TL;DR: In this paper, a Monte Carlo model was used to predict the optimal probe geometry for Raman scattering experiments involving bone, which can provide information about bone composition via a fiber-optic probe placed on the skin.
References
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Journal ArticleDOI
A simplex method for function minimization
John A. Nelder,R. Mead +1 more
TL;DR: A method is described for the minimization of a function of n variables, which depends on the comparison of function values at the (n 41) vertices of a general simplex, followed by the replacement of the vertex with the highest value by another point.
Book
Introduction to Numerical Analysis
Josef Stoer,Roland Bulirsch +1 more
TL;DR: This well written book is enlarged by the following topics: B-splines and their computation, elimination methods for large sparse systems of linear equations, Lanczos algorithm for eigenvalue problems, implicit shift techniques for theLR and QR algorithm, implicit differential equations, differential algebraic systems, new methods for stiff differential equations and preconditioning techniques.
Journal ArticleDOI
A review of the optical properties of biological tissues
TL;DR: The known optical properties (absorption, scattering, total attenuation, effective attenuation and/or anisotropy coefficients) of various biological tissues at a variety of wavelengths are reviewed in this article.
Journal ArticleDOI
New contributions to the optics of intensely light-scattering materials.
TL;DR: In this paper, the Gurevic and Judd formulas were derived from the Kubelka-Munk differential equations, and they are exact under the same conditions as in this paper, that is, when the material is perfectly dull and when the light, is perfectly diffused or if it is parallel and hits the specimen under an angle of 60° from normal.