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基于角锥棱镜的基本结构及定向反射的光学特性,证明了同一光束出射点与入射点的对称关系以及不同入射光束出射点与对应顶点投影点的偏移量关系。推导出不同入射条件下角锥棱镜最大入射角及有效反射面积的理论计算方法,并给出最大入射角随方位角和折射率变化的规律图线及有效反射面积随入射角、方位角、折射率变化的规律图线。研究为角锥棱镜阵列的有效反射面积、回波能量的计算、误差分析等提供理论基础,且对正确设计使用角锥棱镜具有重要的理论指导意义。
Based on the basic structure of the pyramidal prism and the optical characteristics of the directional reflection, the symmetry between the exit point and the entrance point of the same beam and the relationship between the exit point of the different incident beams and the corresponding vertex projection point are proved. The theoretical calculation method of the maximum incidence angle and the effective reflection area of the pyramid prism under different incident conditions is deduced. The law of maximum incidence angle with azimuth and refractive index is given and the effective reflection area varies with the incident angle, azimuth angle, refractive index Change the law line. The research provides the theoretical basis for the effective reflection area of the pyramidal prism array, the calculation of the echo energy and the error analysis, and has important theoretical guidance for the correct design of the pyramidal prism.