USE OF A LASER-BEAM WITH AN OBLIQUE ANGLE OF INCIDENCE TO MEASURE THE REDUCED SCATTERING COEFFICIENT OF A TURBID MEDIUM

被引：148

作者：

WANG, LH

JACQUES, SL

机构：

[1] Laser Biology Research Laboratory, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 77030, Box 17

来源：

APPLIED OPTICS | 1995年 / 34卷 / 13期

关键词：

TISSUE OPTICS; TURBID MEDIA; SCATTERING MEDIA; SCATTERING COEFFICIENT; OPTICAL PROPERTIES;

D O I：

10.1364/AO.34.002362

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A simple and quick approach is used to measure the reduced scattering coefficient (mu(s)') of a semi-infinite turbid medium having a much smaller absorption coefficient than mu(s)'. A laser beam with an oblique angle of incidence to the medium causes the center of the diffuse reflectance that is several transport mean-free paths away from the incident point to shift away from the point of incidence by an amount Delta x. This amount is used to compute mu(s)' by mu s' = sin(alpha(i))/(n Delta x), where n is the refractive index of the turbid medium divided by that of the incident medium and ori is the angle of incidence measured from the surface normal. For a turbid medium having an absorption coefficient comparable with mu(s)', a revision to the above formula is made. This method is tested theoretically by Monte Carlo simulations and experimentally by a video reflectometer.

引用

页码：2362 / 2366

页数：5

共 11 条

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