中文摘要：

计算了简化的平行平板中的温度和热应力分布,根据光弹性理论得到了介质内部折射率的改变,采用矢量微分算法模拟光线在介质中传输的情况,预测了接收面上的光强分布和条纹形状,程序输出图形和作为对照的光弹性实验的结果符合良好,证明了上述分析方法和光传输计算的正确性,为进一步完善光学系统成像质量提供参考.

英文摘要：

In this paper the temperature and thermal stress distribution in a simplified-mode transparent slab is calculated and then variation of refractive index is acquired based on the photo-elastic theory. Using the vector differential algorithm the refractive behavior of rays in such media is simulated,and luminous intensity distribution and shape of fringes at the receiving plane is predicted. The output of the program is in coincidence with the check experiment based on photo- elasticity technique,which indicates the correctness of our analysis method and light transmission calculation method. This research provides a practical means for improving the imaging quality of optical instruments.