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从惯性约束聚变系统高功率固体激光驱动器中具有典型意义的大口径激光传输反射镜的装配结构及其面形精度特点出发,对其波前误差进行了精细化建模分析,分别研究了粗糙度、纹波度和轮廓度的波前误差模型。在此基础上,进一步针对如何在装校过程中将装配应力产生的波前误差控制在合理范围内的问题,提出了方均根梯度与峰谷值相结合的波前误差评价和控制方法,并通过实验验证了其可行性,以期为我国神光-III主机装置大口径反射镜装校过程中波前误差控制提供科学指导方法。
From the assembly structure of the typical large-diameter laser transmission mirror in the high-power solid-state laser driver of inertial confinement fusion system and its surface shape accuracy, the wave front error was refined and modeled. The roughness , Ripple and profile of the wavefront error model. On this basis, further on how to control the wavefront error caused by the assembly stress in a reasonable range in the process of pre-assembly, the wavefront error evaluation and control method based on the root-mean-square gradient and the peak-valley value is proposed. The experiment proves the feasibility of this method, in order to provide scientific guidance for the control of the wavefront error in the process of assembling the large aperture mirror of SG-III host device.