With using absolute optical interferometer for measuring length of block gauge, it is necessary to solve the problem of phase jump for reflecting of light on its surface.
在用绝对光波干涉法测量量块长度时，必须解决光在量块表面反射时的位相跃变问题。
2
Optical fiber gauge is introduced, its non-electricity signal at measuring site will provide powerful guaranty of essential safely.
本系统由于采用了本质安全的光纤传感器技术，现场完全避免了电信号的引入，在安全上有可靠的保障。
3
Describe and review measurement methods such as attribute screens, gauge blocks, calipers, micrometers, optical comparators, tensile strength, titration, etc.