Xia Hui, Miao Caixia, Cheng Jianwei, Tao Shaohua, Pang Ruyi, Wu Xiaoyun
School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China.
Appl Opt. 2012 Jun 1;51(16):3263-8. doi: 10.1364/AO.51.003263.
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*.
我们采用低相干光纤动态光散射（FODLS）技术研究了致密悬浮液中颗粒的散射系数和吸收系数的相关性。利用估计的粒径计算致密悬浮液中悬浮颗粒的散射系数。对吸收性致密悬浮液背向散射光的光程分辨强度分布进行了实验研究。通过将测量得到的光程分辨强度分布应用于修正的朗伯 - 比尔定律，可以得到吸收系数。结果表明，低相干FODLS技术能够同时测量吸收性致密悬浮液中颗粒的散射系数和吸收系数，并且在2l(d) < 10ℓ*的低散射区域内，致密悬浮液中的散射系数和吸收系数相互独立。
