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
Systematic Design of the Color Point of a White LED
TL;DR: In this paper, a new design principle based on an analytical model instead of a numerical approach is introduced. And the model predicts the white LED's color point for any combination of design parameters.
Journal ArticleDOI
Diffuse reflectance and machine learning techniques to differentiate colorectal cancer ex vivo.
Luís Fernandes,Sónia Carvalho,Isa Carneiro,Rui Henrique,Valery V. Tuchin,Hélder P. Oliveira,Luís Oliveira +6 more
TL;DR: In this paper, the authors used machine learning techniques to reconstruct the wavelength dependence of the absorption coefficient of human normal and pathological colorectal mucosa tissues using diffuse reflectance spectra.
Journal ArticleDOI
Structure, rheology, and microrheology of wormlike micelles made of PB–PEO diblock copolymers
Antonio Tavera-Vázquez,Brisa Arenas-Gómez,Brisa Arenas-Gómez,Cristina Garza,Yun Liu,Yun Liu,Rolando Castillo +6 more
TL;DR: Using diffusive wave spectroscopy, the mean square displacement of particles in the micellar solution was measured and |G*| exhibits a power law behavior showing the stress relaxation changes as frequency increases, first dominated by the Rouse-Zimm modes and then by the bending modes of the Kuhn segments.
Patent
A photoprotective composition and screening agents for said composition
TL;DR: In this article, a photoprotective composition comprising at least one interferential screening agent screening UVA and/or UVB was proposed, and the present invention concerns a photOProtective compositional composition.
Journal ArticleDOI
Light scattering in thin turbid tissue including macroscopic porosities: A study based on a Monte Carlo model
TL;DR: In this article, a Monte Carlo code is built taking into account macroscopic spheroid cavities inside a turbid medium, i.e. in mixing Multi-Layer Monte Carlo (MLMC) and Monte Carlo Ray Tracing (MCRT).
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.