中国激光, 2018, 45 (10): 1004003, 网络出版: 2018-10-12
基于散射光谱颗粒折射率测量系统的散射角和放大率的精确确定 下载: 782次
Accurate Determination of Scattering Angle and Magnification Based on Scattering Spectral Particle Refractive Index Measurement System
摘要
基于颗粒光散射成像原理, 通过测量聚焦面上的零级谱与一级谱之间的距离, 即可得到该颗粒的折射率。分析了成像系统接收角和放大率偏差对颗粒折射率测量精度的影响, 给出了接收散射角和放大率的取值范围。提出了一种基于线性拟合精确确定散射角和放大率的实验方法, 并对直径为45 μm的标准聚苯乙烯(PSL)颗粒和19.1 μm的玻璃颗粒的折射率进行测量, 相对测量误差分别为-0.19%和1.53%, 验证了所提方法的有效性。
Abstract
On the basis of the particle scattering imaging, the refractive index of the particle can be obtained by the distance between the zero-order and the first-order spectra on the focal plane. The influences of the received angle and the magnification deviation of the imaging system on the measurement accuracy of the particle refractive index are analyzed. And the ranges of the received scattering angles and the magnification are given. An experimental method based on linear fitting is proposed to accurately determine the scattering angle and the magnification. The refractive indices of standard polystyrene (PSL) particle with diameter of 45 μm and glass particle with diameter of 19.1 μm are measured with the proposed method, their relative measurement errors are -0.19% and 1.53%, respectively. The experimental results verify the effectiveness of the proposed method.
孟睿, 葛宝臻, 吕且妮, 徐捷. 基于散射光谱颗粒折射率测量系统的散射角和放大率的精确确定[J]. 中国激光, 2018, 45(10): 1004003. Meng Rui, Ge Baozhen, Lü Qieni, Xu Jie. Accurate Determination of Scattering Angle and Magnification Based on Scattering Spectral Particle Refractive Index Measurement System[J]. Chinese Journal of Lasers, 2018, 45(10): 1004003.