一种测量透镜曲率半径的新方法

A Mew Approach for Measurmg the Curvature Radius of Lens

分析讨论了牛顿环干涉条纹的附加程差问题，推导出了利用干涉条纹数字化方法计算牛顿环附加程差的公式，提出一种测量透镜曲率半径新方法，克服了传统方法在干涉条纹发生变形时不能保证△（ｒ￣２）恒为常量的困难，并给出了实验结果。

The problem of additional path differenca of Newton's rings is analysed and discussed.The computational formula for the additional path difference of Newton' s rings with the method ofinterference fring digitization is derived.A new approach for measuring the curvature radius of lens isproposed,which can solve the following traditional problem:conventional approaches can not ensure△(r￣2)against changing during the distortion of interference frings,And the results of experiment are given.