利用色散补偿白光相关器及高通滤波技术检测粒子大小

本文提出了一种可用以检测相同形状粒子的大小、具色散补偿作用的白光相关系统,并完成了理论分析及实验验证.通过自动扫描光谱强度(位于固定点的相关峰的)分布,可方便地确定输入物的几何标度.本系统与高通滤波技术相结合,可检测圆环状粒子的大小,其相对误差的精度<2%.

Particle sizing using dispersion-compensated white light correlation and high pass filtering

A simplified white light correlator with a compensation grating has been developed and proved to be effective for particle sizing when high pass filtering is adopted during MSF fabrication. Both the theoretical analysis and experimental results are presented in this paper. By using this technique the soze of objects with the annulus shape can be determined to the accuracy within 1-2% relative error.