猫眼光学系统的硬边光阑效应研究

Research on Hard Edge Aperture Effect of Cat’s Eye Optical System

采用矩阵分解以及将硬边光阑窗口函数展开为复高斯函数叠加的方法,研究了高斯光束猫眼光学系统后的光阑效应;通过数值计算,分析了激光的反射规律。研究表明,入射光束束腰距离猫眼光学系统越远,光学系统的光阑效应越大;调整合适的正离焦量,可以使猫眼光学系统回波光强更高。理论分析和数值计算对猫眼系统的研究具有一定的参考意义。

The hard edge aperture effect of cat’s eye optical system is studied by matrix decomposition and the hard edge aperture window function is expanded into the superposition of complex Gaussian functions. The reflection law of laser is analyzed by numerical calculation. The study reveals that the farther the waist of the incident beam is from the cat’s eye optical system, the greater the aperture effect of the optical system. Meanwhile, adjusting the proper amount of positive defocus can make the echo light intensity of cat’s eye optical system higher. Theoretical analysis and numerical calculation have certain reference significance for the study of cat’s eye system.