一种新的迈克尔逊干涉条纹计数方法

A new Approach to Michelson Interference Fringe Counting

迈克尔逊光干涉现象的应用中常常涉及干涉条纹的计数,传统的计数方法稳定性差、误差大、易出错。本文提出一种迈克尔逊干涉条纹的差分法计数,该方法在对采集到的干涉条纹信号数字滤波的基础上,设计有效参考点自动搜寻算法,确定有效参考范围,利用差分算子实现迈克尔逊干涉条纹的自动计数。实验结果表明,用该方法设计的计数器稳定性强,精度高。

In application to Michelson interference fringe,people used to count the interference fringe in the traditional method,which induces poor stability and large error in counting. In this paper,we propose arithmetic based on gradient for counting the Michelson interference fringe. This arithmetic first digital filter the signal and find out the validated reference point and range automatically,then count the interference fringe make use of gradient operator. Experimental result shows that the counter designed by this arithmetic has greater stability and high accuracy.