The position of the rod is determined by a micrometer screw gauge or spherometer.

杆的位置由千分尺螺丝规或球度计确定。

A new spherometer based on self-reference laser shearing interferometric technique is described The principles and error analysis of the spherometer are given in detall.

本文根据自参考剪切干涉技术，采用球面补偿自准直原理，提出了一种新型激光干涉球径仪。