The basic optical theory was used to deduce the hypostatic mathematics model of corner reflector in detail. The characteristics of retro - reflector is demonstrated when the light beam is perpendicular or declining based on reflection and refraction; Mathematics model which perpendicular errors effect on the ray direction is built s Mathematics model which slightly curved surfaces errors effect on the phase shift is bui The area of effective aperture is calculated based on the symmetry; The diffraction area of the receiving surface is computed based on the beam divergence angle; the effects of perpendicular errors and surfaces errors is analyzed and simulated.%借助基本的光学理论,详细推导了角反射器特性本质的数学模型；从基本反射和折射原理出发,推导出当光线垂直入射、倾斜入射时的出射光线空间矢量,揭示出角反射器的本质特性;建立角反射器的直角误差对反射光线影响的数学模型；建立面形误差对反射光线影响的数学模型；由光反射的对称特性,揭示出光垂直入射、倾斜入射角反射器时,有效反射区域面积的计算方法；由衍射原理发散角的计算公式,推导出接收屏上衍射区域的计算公式；分析和仿真直角误差和面形误差对远场远射光强的影响.
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