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在几何光学中,P=C×D的物理意义为:镜片上某一点处的棱镜度(P)等于该点至镜片光学中心的距离(C)与该镜片后顶焦度(D)的乘积。其中 P:棱镜度 单位cm/m; C:某点至镜片光学中心的距离单位 cm; D:镜片后顶焦度 单位I/m; 在检测验光镜片光学中心位移
In geometrical optics, the physical meaning of P = C × D is that the degree of prism (P) at a point on the lens is equal to the product of the distance from this point to the optical center of the lens (C) and the vertex power of the lens (D) . Wherein: P: Prism unit cm / m; C: a point to the optical center of the lens distance in cm; D: lens vertex power unit I / m; in the detection optometric lens optical center displacement