中国激光, 2011, 38 (7): 0702015, 网络出版: 2011-06-28
畸变猫眼效应反射光束的回程传输特性
Backwards Propagation Characteristics of Distorted Reflected Beams with Cat-Eye Effect
激光光学 猫眼效应 畸变光束 光学镜头 回程传输特性 laser optics cat-eye effect distorted beam optical lens backwards propagation characteristics
摘要
运用Collins衍射积分公式以及将硬边光阑窗口函数展开为有限个复高斯函数之和的方法,推导了倾斜探测光束通过有中心遮挡和探测器倾斜的猫眼光学镜头的三维解析传输公式。通过数值计算分析了畸变反射光束的回程传输特性。研究表明,入射角和探测器倾斜角的存在导致反射光束产生不对称畸变,且反射光中心相对原路返回位置存在偏差。中心遮挡和入射角的存在导致反射光束成为扭曲的空心光束。随着回程传输距离的增大,畸变的反射光束逐渐演变为实心单峰光束。
Abstract
Based on the generalized Collins diffraction integral and the method of expanding the aperture function into a finite sum of complex Gaussian functions, an approximate three-dimensional analytical formula for oblique detected laser beam passing through a cat-eye optical lens with center shelter and oblique detector is derived. Propagation characteristics of the distorted reflected beam are performed by numerical calculation. The results show that the incident angle and the oblique angle of the detector create unsymmetrical distortions of the distribution and a certain departure from the return centre. The reflected beam will become a distorted hollow beam because of the existent of the incident angle and the center shelter. The reflected beam gradually evolves into a solid single peak beam with the increase of the propagation distance.
赵延仲, 孙华燕, 张来线, 郑勇辉. 畸变猫眼效应反射光束的回程传输特性[J]. 中国激光, 2011, 38(7): 0702015. Zhao Yanzhong, Sun Huayan, Zhang Laixian, Zheng Yonghui. Backwards Propagation Characteristics of Distorted Reflected Beams with Cat-Eye Effect[J]. Chinese Journal of Lasers, 2011, 38(7): 0702015.