不同对流马赫数下光束畸变的实验研究  

Experimental research on aberration of small light beam at different convective Mach number

作　　者：甘才俊[1] 李烺[1] 毛涛[1] 马汉东[1] 熊红亮[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《光学技术》2011年第6期730-734,共5页Optical Technique

基　　金：科技部973计划资助项目(2009CB724105)

摘　　要：利用双曝光CCD相机成像技术,研究了小直径光束穿越可压缩混合层流场后所引起的气动光学效应。实验研究结果表明:在不同对流马赫数(Mc=0.17,0.45)下,光束投影(点扩散函数,PSF)发生了不同程度的变形和偏移。此外在不同对流马赫数下细光束投影都存在扩束、缩束和面积几乎不变的现象,但光束投影出现扩、缩束的概率不同。Using double-exposure CCD camera imaging system,aero-optical effect of a small light beam passing through compressible mixing layer is investigated.The experimental research results show that the shape of beam projection are distorted at different convective Mach number.In addition,overspreading and contractive beam projections are also found,however the probability of existence of overspreading and contractive beam projection is different at different convective Mach number.

关 键 词：气动光学效应 对流马赫数 点扩散函数 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]