光路自动准直系统用于高功率固体激光装置光路自动调整,确保从预放注入的光束准确地通过主放大级光路到达靶点,准直算法和流程控制是光路自动准直的两项关键技术。针对神光-Ⅲ原型装置光路自动准直系统的腔镜准直算法,基于图像处理技术,提出了基于空间滤波小孔图像信号区域面积最大,长短轴控制以及x,y轴长度控制3种算法。在原型装置上开展的实验表明,x,y轴长度控制算法最有利于准直闭环控制的实现,其准直精度优于90μm。在自适应波前校正系统完成波前预校正后,针对灰度分布变化的远场图像,再使用光路自动准直系统,对光束远场重新准直定位。结果表明,优化后的准直流程可以消除波前预校正对光束远场定位的影响。 Automatic alignment of optical path for high-power solid-state laser device automatically adjusts the optical path to ensure that the beam from the pre-injection into the optical amplifier accurately through the main path to reach the target point, the alignment algorithm and the flow control is the automatic alignment of the two key technologies . According to the cavity mirror collimation algorithm of optical automatic alignment system of SG-Ⅲ prototype device, based on the image processing technology, three kinds of algorithms based on spatial filtering, such as the largest area of ​​pinhole image signal, the control of long axis and short axis and the length of x- and y- . Experiments carried out on the prototype device show that the x and y axis length control algorithms are most conducive to the realization of collimation closed-loop control, and the collimation accuracy is better than 90μm. After the adaptive wavefront correction system completes the wavefront pre-correction, aiming at the far-field image with changing gray distribution, the light path auto-collimation system is used to re-collimate the beam far field. The results show that the optimized collimation process can eliminate the influence of wavefront pre-correction on the beam far-field localization.