摘要
闭锁效应是影响激光陀螺性能的重要因素,而光束在反射镜表面反射时的背向散射则是形成闭锁效应的主要原因。基于矢量叠加理论,对激光陀螺反射镜背向散射对谐振腔总背向散射的影响进行了分析。在此基础上,提出一种反射镜散射的在线测量方法,以半导体激光器为光源构成远心光路,通过显微镜收集散射光,并利用CCD记录反射镜膜面的散射光场。根据散射图样对反射镜进行筛选,并最终确定反射镜膜面的安装位置与方向。在某型激光陀螺上进行了实验,结果表明使用该方法选配可以将锁区合格率由原来的75%提升至95%,改进效果明显。该检测方法结构简单,可有效控制由反射镜散射引起的锁区超标问题,在激光陀螺反射镜的在线检测及激光陀螺装调方面有很好应用前景。
A key factor that influences the performance of laser gyro is lock-in effect, whose main reason is the backscattering caused by mirror reflection. In this paper, the effect of mirror backscattering on the total backscattering of laser gyro was analyzed, and a test method for mirror backscattering was proposed. The semiconductor laser was chosen as the laser source, and the scattering of the mirror was collected through a microscope. Then the image was acquired by a CCD camera. According to the scattering pattern, the mirror could be selected. Furthermore, the position and direction for installation could ultimately be determined. Experiments were conducted for a certain type of laser gyro, and the results show that the pass rate is increased from 75% to 95% by using this method. The structure is simple with high-precision fast untouched real time test. It turns out that the lock-in of laser gyro induced by the mirror scattering could be effectively controlled. This method has good application prospect in the real time work-piece test.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2015年第4期540-543,共4页
Journal of Chinese Inertial Technology
基金
航空基金支撑项目(61901060301)资助课题
关键词
激光陀螺
背向散射
锁区
显微成像
表面缺陷
laser gyro
backscattering
lock-in
microscopic imaging
surface defects
