Abstract. Aiming to minimize the surface distortion of large-aperture laser transport mirrors in high-power laser facilities, an assembly design and mounting method are proposed for the mirror. First, a theoretical model on the mirror surface deformation is established. With a new assembly design, the mirror is fastened on its neutral plane and its optical surface distortion can be precisely compensated through several adjustable forces on the sides, which will generate bending moments on the mirror body. Furthermore, a dynamic kinematic joint is designed, in which a corresponding relationship between spring compression and screw rotation ensures the accurate control of the magnitude of mirror preload. Finally, the performance of the presented method has been validated through field experiments and numerical simulations. This transport mirror assembly and mounting design have obvious technical advantages on simple mechanical structure, high operational efficiency, and precise preload control. The results show that the assembly design and optimized mounting strategy can keep the total surface distortion of the mirror within 350 nm (peak-valley).

中文翻译：

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高能激光设备大口径激光传输镜高精度组装工艺

摘要。针对大功率激光设备中大口径激光传输反射镜的表面畸变最小化，提出了该反射镜的组装设计和安装方法。首先，建立镜面变形的理论模型。采用全新的组装设计，将反射镜固定在中性平面上，可以通过侧面的多个可调节力精确补偿其光学表面畸变，这会在镜体上产生弯矩。进一步设计了动态运动关节，弹簧压缩与螺杆旋转的对应关系保证了镜面预紧力大小的精确控制。最后，通过现场实验和数值模拟验证了所提出方法的性能。这种传输镜组装和安装设计在机械结构简单、运行效率高、预紧控制精确等方面具有明显的技术优势。结果表明，组装设计和优化的安装策略可以将反射镜的总表面畸变保持在 350 nm（峰谷）以内。