颗粒场激光同轴全息术在小颗粒测量上的应用  

Application of Laser In-line Holography to Field Measurement of Small Particles

作　　者：鲁静[1] 

机构地区：[1]湖北第二师范学院计算机学院,武汉430205

出　　处：《湖北第二师范学院学报》2012年第8期28-30,共3页Journal of Hubei University of Education

基　　金：湖北第二师范学院创新团队建设计划;湖北第二师范学院院管课题(2011A001)

摘　　要：与离轴全息术相比,同轴全息术有着光学系统简单、对光源相干性要求低、只需使用低功率光源、并且受环境振动和扰动影响小等优势。然而,当被测颗粒的直径小于成像系统点扩散函数的直径时,图像噪音变大,难以保证粒径测量的精确性。针对此问题,本文就全息图像去噪、颗粒定位和颗粒数值重建等关键技术进行了研究与讨论。Comparing with off-axis holographty,in-line holography has many advantages,such as simple optical system,low demand for the coherence of the light source,low power light source,small effect by environment vibration and disturbance.However,as for small particles whose diameter are smaller than that of the point spread function of the imaging system,the image noise grows huge and the accuracy of particle sizing is not guaranteed.In this paper,to solve the above problem,the key technologies such as holographic image denoising,particle identification and particle numerical reconstruction are studied and discussed.

关 键 词：颗粒场 微粒测量 颗粒定位 同轴全息 

分 类 号：TP751.2[自动化与计算机技术—检测技术与自动化装置]