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一个形状复杂的棱镜,尺寸及尺寸误差相互制约,在光学冷加工中这些相互制约的尺寸及误差都是随机变量,这些随机变量在加工中被表征为边长的变化量和顶点的位移量。工艺者总是希望在一定加工时间控制边长的变化和顶点的位移在设计允许的误差范围内变化,习惯地给定工艺尺寸达不到这个目的。精确地计算工艺尺寸才是根本方法,在批量生产中这种计算显得尤为重要。批量生产中光学零件的尺寸超差将影响装配的效率、产品零件的互换性,以致影响产品的质量和信誉。实践证明通过精确计算给定工艺尺寸使加
A complex shape of the prism, the size and size of the mutual constraints of error, in the optical cold-processing of these mutual constraints of size and error are random variables, these random variables in the processing is characterized by changes in the side length and vertex displacement. The craftsman always hopes to control the change of the side length and the displacement of the vertex at a certain processing time within the allowable error range of the design, so that the given process size can not be used conventionally for this purpose. Accurate calculation of process size is the fundamental method, which is particularly important in mass production. The oversized optical components in mass production will affect the efficiency of the assembly, the interchangeability of the product parts, so as to affect the quality and reputation of the product. Practice has proved that by accurately calculating the size of a given process