The paper studies mainly a new kind of measure method of aspheric surface - laser wavelength - scanning interference testing . this research is aimed at putting forwarding laser wavelength scanning interference testing method . processing and analyzing instantly - read interference pattern corresponding with continuous varying wavelength , the method overcomes the following disadvantage : the longer referenced and measuring optical circuit in big - scale high - accuracy asphere testing and the sensitive interferential system to the disturb , such as the oscillation of worktable , dithering of air , and so on 研究的主要目的是针对在大型高精度非球面面形检测中干涉仪的参考光路和测量光路较长，干涉系统对工作台振动和空气抖动等外界干扰因素的影响敏感，干涉图不稳定等问题，提出了激光波长扫描干涉测试方法，该方法通过对瞬间读取的、与连续变化波长对应的干涉图的处理和分析，克服了上述缺点，为大型高精度非球面的检测提供了一种适用的方法。
In this paper , we summarize the present testing status of optical aspheric surface , expound the principle of laser wavelength scanning interference testing method , and analyze the laser that can be tuned , and we also study the change of wavelength . further more , we achieve the elementary design of experiment device , and curtly introduce the method and principle for interference fringe processing 本文对目前国内外的光学非球面的测量现状作了概略的叙述，给出了激光波长扫描干涉测试方法的原理，对波长可调谐的激光光源进行了分析，对激光器波长的变化进行了研究，对实验装置进行了初步的设计，并对干涉条纹图处理的方法和原理进行了简单的介绍。
Based on an amplified spontaneous emission ( ase ) source , a ring - cavity fiber laser , in which sensor element acted as the reflector of the cavity , was achieved with high - signal noise ratio ( snr ) and high - power . it was demonstrated that the output power was maximum , when output coupler ratio of the coupler was seventy percent 实验证实耦合器的输出耦合比选为某一个最佳值70 ，当980nm泵光工作电流为50ma时，其输出功率达3 . 5mw ，且输出激光波长与作为反射镜的光纤光栅中心波长相同。
