激光微粒影象的三维判读技术  

EVALUATION OF PARTICLE SIZES AND POSITIONS BY THEIR COHERENT IMAGES

作　　者：方金焰 严传俊[1] 王宏基[1] 

机构地区：[1]西北工业大学

出　　处：《航空动力学报》1990年第3期224-226,共3页Journal of Aerospace Power

摘　　要：A new approach to evaluate the particle sizes and positions has been deve loped on the basis of their coherent images.According to the experimental and calculated results about the coherent images of steady particles,the paper described the features of coherent images of particles.It is concluded that the characteristics of the coherent images are different from those in incoherent cases,and the more the image deviates from the focus,the more obvious the differences are.From theoretical analysis, the conclusion has been drawn and proved that the normalized intensity distributions of coherent images of particles are the same when their recording far-field conditions are identical.The new method to determine the particle sizes and positions is just based on this conclusion.A new approach to evaluate the particle sizes and positions has been deve loped on the basis of their coherent images.According to the experimental and calculated results about the coherent images of steady particles,the paper described the features of coherent images of particles.It is concluded that the characteristics of the coherent images are different from those in incoherent cases,and the more the image deviates from the focus,the more obvious the differences are.From theoretical analysis, the conclusion has been drawn and proved that the normalized intensity distributions of coherent images of particles are the same when their recording far-field conditions are identical.The new method to determine the particle sizes and positions is just based on this conclusion.

关 键 词：激光摄影 微粒影象 判读技术 三维 

分 类 号：TB879[一般工业技术—摄影技术]