This paper is concerned with the principle of a non - contact optical instrument for measuring the surface roughness of a magnetic disk with an opto-heterodyne interferometer.
根据外差干涉计量术的原理，研制了非接触式的光外差干涉磁盘表面粗糙度测量仪。
2
The introduction of the structure of non-contact vibration sensor improved the durability of the instrument, realizing the two-dimensional vibration testing.
该测震装置引入无触点振动传感器的结构以提高装置的耐用性，实现了二维振动的检测。
3
This paper made full use of machine vision's characteristics of non-contact, high efficiency and high precision, and develop an instrument for on-line measuring parameter of oil pipe thread.