变焦凸轮曲线的优化设计

Optimized design of vari─focus cam contour

本文以２．５￣（×）小变焦照相物镜为例。推导了变焦凸轮曲线斜率之间的关系式，以及如何选取变焦凸曲线压力角的值域。并介绍了具体的设计步骤、方法。

Taking a small 2.5￣(×) vari─focus pholo─objective as an example,an expression of curve alope of the vari─focus cam was deduced.The way to choose the range of pressure angle of cam contour as well as the concrete designing steps and methods was introduced.