近背向散射测量系统中漫反射板的特性研究  

Characteristis research of diffuser panel in near backscatter measurement system

作　　者：韩洋[1,2] 何俊华 闫亚东[1] 吴冰静[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2017年第9期195-201,共7页Infrared and Laser Engineering

基　　金：国家教育部博士点(西部)基金(200929441213)

摘　　要：通过分析激光聚变中近背向散射光的收集方式,提出了采用漫反射板收集近背向散射光的方法。通过对漫反射板的应用场景分析,提出了需要研究的漫反射板特性,并搭建了漫反射板特性测量装置。测量并分析了漫反射板的方向半球反射比、双向反射分布函数、面均匀性、真空特性和紫外特性。分析结果表明:F4目标板具有接近于0.99的高反射率,光谱平坦性,近似余弦分布的双向反射分布函数,较高的面均匀性,以及较小的紫外真空影响。因此,F4目标板满足激光惯性约束聚变中近背向散射光的测量需求,采用漫反射板收集近背向散射光的方法可行。Based on the analysis of near back scattered light in laser fusion, a method was proposed to collect near back scattered light by using diffuser panel. Based on the analysis of the application scenarios of the diffuser panel, the characteristic of the diffuser panel was presented. A device for measuring the characteristics of diffuser panel was set up. The directional hemispherical reflectance （DHR）, bidirectional reflectance distribution function, surface uniformity, vacuum and UV properties were measured and analyzed. The analysis results show that the F4 target panel has a high reflectivity close to 0.99, the spectral flatness, the bidirectional reflectance distribution function （BRDF） of approximate cosine distribution, 0.869 6% of the higher surface uniformity, as well as the smaller UV vacuum influence. Therefore, the F4 target panel meets the measurement requirements of the near back scattered light in laser inertial confinement fusion （ICF）, and it is feasible to use the diffuser panel to collect the near back scattered light.

关 键 词：近背向散射光诊断 收光装置 漫反射板 方向半球反射比 相对双向反射分布函数 

分 类 号：TN247[电子电信—物理电子学]