针对传统方法抛光高功率激光实验中使用的长焦距列阵透镜单元遇到的检测困难、一致性差等问题，提出了采用环形抛光的新方法。对环形抛光系统的理论分析表明，抛光盘面形可以稳定在球面状态。利用这种特性，环形抛光法可以抛光小曲率球面。阐述了抛光盘面形的调节方法。利用0.69 m 环形抛光机对口径45 mm、曲率半径57207 mm 的列阵透镜单元进行了抛光，结果表明面形精度和一致性均优于平面摆动式抛光法。最后对环形抛光机可抛光的球面曲率半径范围进行了探讨，发现盘面尺寸越小球面抛光能力越强，直径0.8 m 的盘面可抛光的曲率半径可低至10 m。

针对传统方法抛光高功率激光实验中使用的长焦距列阵透镜单元遇到的检测困难、一致性差等问题，提出了采用环形抛光的新方法。对环形抛光系统的理论分析表明，抛光盘面形可以稳定在球面状态。利用这种特性，环形抛光法可以抛光小曲率球面。阐述了抛光盘面形的调节方法。利用0.69 m 环形抛光机对口径45 mm、曲率半径57207 mm 的列阵透镜单元进行了抛光，结果表明面形精度和一致性均优于平面摆动式抛光法。最后对环形抛光机可抛光的球面曲率半径范围进行了探讨，发现盘面尺寸越小球面抛光能力越强，直径0.8 m 的盘面可抛光的曲率半径可低至10 m。

Aiming at the problems such as difficult to mearsure and bad consistency of the surfaces in polishing long-focus lens array elements by conventional method, the new way using continuous polishing machine is proposed. According to the theoretical research of the continuous polishing system, the surface of the polishing pad can keep spherical. The workpieces with small curvature spherical surfaces can be polished with the character. The adjusting methods of the polishing pad surface curvature are elaborated. According to the experiments of polishing lens array elements with aperture of 45 mm and curvature radius of 57207 mm in 0.69 m continuous polishing machine, the element surface accuracy and consistency are both better than using conventional oscillating polishing method. At last, the range of the curvature radius that can be polished in the continuous polishing machine is discussed and find that the smaller the polishing pad is, the stronger the ability of polishing spherical surface is. The radius of curvature which is polished in 0.8 m diameter can be as amall as 10 m.

In order to realize less than 30μm the pointing error of the main laser and the large focal spot irradiation uniform on target surface better than 10% of the additional beam in ＂Shenguang- Ⅱ ＂ laser facility, a physical design of final optics assembly（FOA） has been proposed. Using finite element method, the static and dynamic states about the main machine components of FOA and the integral ICF target chamber are analyzed and the design of FOA is optimized. And using mathematics simulation, lens array has been analyzed and designed based on the focus lens about unit number, radius, thickness, long axis and short axis. Experimental results show that the pointing error of main laser on the target is 28.9μm , the large focal spot is 1000μm× 500 μm and the large focal spot irradiation uniform is 12.0%.

针对"神光-Ⅱ"装置第九路系统主激光瞄准精度小于等于30 μm和大焦斑辐照均匀性优于10%的要求,提出了靶场终端光学组件的设计结构.应用有限元法对组件关键机械元件和ICF靶室整体进行动静态分析,优化了设计参数.同时与聚焦透镜配合进行数值分析列阵透镜,确定了单元数、曲率和厚度以及单元长和宽等参数.经过实验测试,主激光瞄准精度达到28.9 μm,大焦斑辐照的形状为1 000 μm×500 μm,均匀性为12.0%.

The distribution of optical field passing through lens array is analyzed. Lens array consists of many array units, which can improve energy distribution uniformity around the focus of main lens. Lens array improves illumination, but it brings bad affection to energy measurement. The reason is that intervention will happen between sub-beams after the array units, thus energy density and power density of laser on the interference stripes will increase sharply. Its value will augments to four times contrasting to former one. The higher energy and power need more severe criteria to calorimeter. If proper means is not taken in use, calorimeter will be destroyed.

结合列阵透镜的透过率分析了其后的光场分布。列阵透镜由多个列阵元拼接而成,用以改善主透镜焦点附近能量分布的均匀性。列阵透镜在提高辐照均匀性的同时,给能量测量带来了不利的影响。这是由于经过列阵元的相邻子光束会产生干涉,干涉条纹处的激光能量密度和功率密度相应都大为增加,其数值在干涉区域中心处能上升到原来的4倍。更高的能量密度和功率密度对能量计提出了更苛刻的要求。在没有采取适当措施的时候使用,就会损坏能量计。

Being aimed at the condition with ultra nonuniform of near field distribution from "Shenguang Ⅱ" (with none laser intensity in large area), by use of the uniform technique of lens array and by the optimizing design for the system combined with principal focal lens and small lens array, a large spot uniform irradiation on target surface has been realized, also a shock illuminant signal with good planarity in large region is obtained while it drives an aluminium plane target.

On the basis of the threebeam output of basic frequency from "ShenguangII" laser facility and beam smoothing technology of lensarray, the shock wave with a better planarity in ranged 650～750μm the target was created after optimum design and rational combination for laser beam. Then the efficiency of output beams from "ShenguangII" laser facility had been raised. And the shock stability experiment with the inclinedplane target indicated that the shock wave steadily propagated in the Al target of thickness of about 28.38～55.82 μm and 22.13～35.07 μm under the power density of 3.26×1014 W/cm2 and 3.11×1014 W/cm2 respectively.

利用小透镜列阵均匀化技术,针对"神光-Ⅱ"出射光束近场光强特殊分布(有大面积光强为零的区域)的情况,通过对主聚焦透镜及小透镜列阵组合系统的优化设计,实现了靶面光强的大光斑均匀辐照,并利用其驱动平面铝靶,获得了具有大范围良好平面性的冲击波发光信号.