入射角对猫眼光电系统回波光强分布的影响  

Influence of incident angles on echo intensity distribution of cat's eye photoelectric systems

作　　者：滕渊[1] 和婷[1] 左帅[1] 

机构地区：[1]华北光电技术研究所固体激光技术国家级重点实验室,北京100015

出　　处：《激光技术》2015年第6期873-876,共4页Laser Technology

摘　　要：为了研究入射角对猫眼光电系统回波光强分布的影响,从广义衍射积分公式出发,建立了倾斜高斯光束通过猫眼光电系统的光强分布模型,推导出其传输解析表达式,数值模拟了两种探测距离下光强分布随入射角度的变化规律。结果表明,在猫眼光电系统的半视场角范围内,入射光束为高斯光束时,探测距离、入射角的共同增大使得回波光束的能量逐渐减小,且分布模式越来越接近高斯模式;相比近距离探测,远距离探测时回波光强分布达到高斯模式对入射条件的要求更为严格。该研究为实际侦察提供了理论依据,尤其对入射角的选取具有指导意义。In order to study effect of incident angles on echo intensity distribution of a cat＇s eye photoelectric system,the model of intensity distribution of Gaussian beam passing through the cat＇s eye photoelectric system was built on the basis of generalized diffraction integral formula and the analytical expressions of transmission were deduced. The intensity distribution varying with the incident angle at two detection distances was simulated numerically. The results show that in the range of half the field of view of a cat＇s eye photoelectric system,when incident beam is Gaussian beam,the power of echo light beam becomes smaller with the increase of detection distance and incident angle and the distribution mode is close to Gaussian mode. Compared with the short distance detection,echo intensity distribution of the long distance detection which reaches the Gaussian mode has more stringent demands for incidence condition. This study provides theoretical basis for actual detection and has particular significance for selection of incidence angles.

关 键 词：激光技术 广义衍射积分 高斯光束 回波光强分布 

分 类 号：TN249[电子电信—物理电子学]