为满足圆形透镜中心偏的要求,通常采用定心磨边和修改边厚差两种加工方法。本文仅对改边厚差法中的几个问题进行探讨。一、边厚差和中心偏的关系由于对透镜中心偏定义不同,计算方法也不同。我们只讨论球心偏一种,即将透镜中心偏看作其球面的球心离开几何轴的距离。 In order to meet the center of the circular lens requirements, usually using the centering edging and modification of edge thickness difference two processing methods. This article only discusses some problems in the method of changing the thickness difference. First, the relationship between edge thickness difference and the center Because of the different definition of the center of the lens, the calculation method is also different. We only discuss a partial center of the ball, the center of the lens will be regarded as the center of the sphere from the geometric axis of the ball away from the geometric axis.