Study of optical parameters of polystyrene spheres in dense aqueous suspensions.
We investigated the dependence of the scattering and absorption coefficients of particles in dense suspensions by the low-coherence fiber optic dynamic light scattering (FODLS) technique. The estimated particle size was used to calculate the scattering coefficient of particles suspended in dense suspensions. The path-length resolved intensity distributions of light backscattered from absorbing dense suspensions were investigated experimentally. The absorption coefficient can be obtained by applying the measured path-length resolved intensity distributions to the modified Lambert-Beer law. As a result, the low-coherence FODLS technique can simultaneously measure the scattering and absorption coefficients of particles in absorbing dense suspensions, and the scattering and absorption coefficients are independent of each other in dense suspensions in the low-scattering regime of 2l(d) < 10ℓ*.
School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China. xhui73@csu.edu.cn
Hui
H
Xia
Caixia
C
Miao
Jianwei
J
Cheng
Shaohua
S
Tao
Ruyi
R
Pang
Xiaoyun
X
Wu
D000465:Algorithms; D005336:Fiber Optic Technology; D007368:Interferometry / Q000379:methods*; D008027:Light; D010316:Particle Size; D011137:Polystyrenes / Q000032:analysis*; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods; D013535:Suspensions; D014867:Water / Q000737:chemistry
D011137:Polystyrenes; D013535:Suspensions; D014867:Water