斜入射情况下猫眼效应反射光的原路返回特性

Return Back Characteristics of Cat Eye Effect Reflected Light Under Oblique Incidence Condition

为研究斜入射情况下猫眼效应反射光的原路返回特性,提出确定猫眼效应原路返回性的严格判据是反射光与入射光的重心是否重合。按照高斯光束通过透镜的传输和变换规律,推导得出倾斜高斯光束通过光学镜头后的猫眼效应反射光的重心坐标,然后通过与入射光重心坐标的对比分析发现,猫眼效应反射光的原路返回特性与入射角、离焦量和焦距等参数具有一定的约束关系,仅在理想正入射情况下才具有严格意义上的原路返回性。

In order to study the return back characteristics of the cat eye effect reflected light under oblique incidence condition, it is proposed that a strict criterion for making sure the return back characteristics of the cat eye effect reflected light is that the barycenter of the reflected light and the incidence light is superpose or not. By using the rules that Gaussian beams apply when transferring and transforming through lens, the barycenter of the cat eye effect reflected light when the Gaussian beam passing through the optical lens slantways is deduced. After comparing the barycenter of the reflected beam and the incidence beam, it is known that a restriction relation is existed between the return back characteristics of the cat eye effect reflected light and the incidence angle, the focal shift, the focus, etc. The strict return back characteristics of the cat eye effect reflected light is only existed in the perfect circumstance when there is no focal shift and incline.