自拍外差混合光子相关谱与微粒粒径测量  

Mixed Photon Correlation Spectroscopy of Self-beating and Heterodyne and Particle Sizing

作　　者：王少清[1] 娄本浊[1] 张军[1] 金卫东[1] 

机构地区：[1]济南大学理学院,济南250022

出　　处：《光电工程》2008年第3期44-47,共4页Opto-Electronic Engineering

基　　金：山东省自然科学基金(Y2001F12);山东省教育厅科技攻关计划(J04A16)资助项目

摘　　要：对实际微粒体系的自拍与外差混合的光子相关谱(PCS)进行了理论分析与模拟计算,结果表明用纯自拍或纯外差算法反演自拍与外差混合的PCS时得到的微粒粒径相对误差可达100%。提出了一种从混合PCS反演微粒粒径的方法。搭建了一套能够产生混合PCS的模拟实验装置。用其分别对含有标称粒径为60nm和200nm的标准聚苯乙烯乳胶球微粒体系进行了测量。实验结果表明,用本文提出的方法反演混合PCS得到的微粒粒径与标称值的相对误差均在5%以内。Both the theoretical analysis and computing simulation were done for the photon correlation spectroscopy （PCS） of an actual particle system, and the results showed that the relative error of the reversed particle size could be up to 100% if the mixed PCS was reversed only by the self-beating or heterodyne arithmetic. So we presented a method of reversing the particle size from a mixed PCS. A simulated experimental arrangement which can give rise to the mixed PCS was built. Two particle systems, composed of standard polystyrene latex spheres with nominal diameters of 60rim and 200nm, were examined with the arrangement. The experiment result shows that compared with their nominal values, the relative errors of the reversed particle sizes are all within 5% when the mixed PCS is reversed by the proposed method.

关 键 词：动态光散射 颗粒粒度测量 光子相关谱 PCS 

分 类 号：O432.2[机械工程—光学工程]