一种共光路自动对准系统

强激光发射装置和光电跟踪系统中,光学器件多,光路复杂,光学机械零件位置的相对移动会使光轴平行度偏离,为此提出一种共光路自动对准系统.基于对准原理,利用激光发射光路,建立上、下行基准光束,使之分别与系统轴系、出射激光平行,并且通过自准直CCD测角仪测出上、下行光路的角偏差值,控制信号驱动快速控制反射镜,使快速控制反射镜两轴转动到角偏差为零值,实现发射激光与一级扩束系统对准及一级扩束系统与跟瞄系统之间的精密自动对准.实验结果表明,对准后的光轴平行度为5.21",快速控制反射镜的闭环精度不大于5".

Common Path Auto-Alignment System

Because of the complicated optic path and many optical components, relative shift of the optic mechanical parts can cause easily optic-axis parallelism departure the normal direction in high power laser launch equipment and multi-axial photoelectric tracking system. Therefore a real time auto-alignment system is proposed. Based on the alignment principle, up and down datum beam is built and paralleled with the axes of the system and the output laser separately by using the path of emitting laser. By using the CCD auto-collimator to measure the angle error of up and down path, signal is controlled to drive the fast steering mirror until the angle error of the two axes is zero. The alignment between emitting laser and the first beam expanding system and the fine alignment between the first beam expanding system and tracking and pointing system can be realized. Eperimental results show that optical-axis parallelism is 5.21″, and the accuracy of close-loop of fast steering mirror is smaller than 5＂.