激光散斑初级像差校正系统

The System of Aberration Revised Based on Laser Speckle

在激光散斑干涉系统中,光线经过各个光学器件表面的传输过程中,都不可避免的会产生多种像差,尤其是CCD成像前的聚焦系统,像差会使成像产生模糊,变形、误差较大等缺陷。本论文利用ZEMAX光学设计软件,设计了由2组4片式透镜组与一个光阑组成的相差校正系统。该系统,结构简单,成本低廉,制作难度低,并对光线传播路径没有影响。ZEMAX软件可精确绘出透镜组结构。通过测量该软件模拟出的散斑的尺寸以及塞得尔系数值,对该光学系统的性能进行评估。结果表明,通过本文设计的光学系统的光线,其各项初级像差均得以减小甚至消除,对散斑成像质量会大幅度提高。

In the actual optical system, the light through various optical device surface in the process of transmission. It will produce a variety of aberration inevitably, especially the focusing system before imaging by CCD camera. The aberration will cause many defects which are fuzzy, distorted and biggish error. Based on the ZEMAX software, the system was composed of two balsaming lens, and each of the balsaming lens was from two glasses. The system has simple construction, low price, easy to make, and no effection on experimental light path. The ZEMAX software can draw the battery of lenses precisely. And we can test the size of speckle and seidel coefficients which are simulated by ZEMAX. The results show that each of the aberration of the ray has been revised by the system we designed. The imaging quality has been enhanced observably, which takes the size of speckle to be littler.