The mathematical expression of reflectionmodulation function is derived in this paper. The detection principles of two kinds of structures in the optic fiber colour mark sensor are presented.
文中导出了反射光调制函数的数学表达式，并介绍两种结构的光纤色标传感器的检测原理。
2
The principle and experimental results of phase modulation optical heterodyne detection technique for measuring reflection of optical cavity are described.
本文叙述了用位相调制光外差技术探测光学谐振腔反射特性的原理及实验结果。
3
Dynamic modulation of laser and laser bean, and offset to target reflection coefficient: laser bean is shaped and collimated to round and slender beam by using of the semiconductor laser.