适用于激光聚变实验的短焦距高放大倍率Wolter显微镜设计

Design of Wolter microscope with short focal length and high magnification for laser fusion experiment

围绕内爆压缩及阻滞阶段相关物理实验的诊断需求,提出了一种满足阿贝正弦条件的短焦距高放大倍率Wolter-Ⅲ型X射线显微镜的光学设计。详细介绍了Wolter-Ⅲ型显微镜的结构特点和设计方法,与Wolter-Ⅰ型相比可以通过将主平面向靠近物点方向移动的方式减小系统焦距,从而获得更大的放大倍数,实现显微镜与探测器的像质匹配,提高诊断系统的空间分辨。由光线追迹可以得出,在±190μm的视场范围内,空间分辨率优于3μm;在±240μm范围内分辨率优于5μm;在±300μm范围内分辨率优于8μm,几何集光立体角约为5×10^(−6) sr。

To meet the diagnostic requirements of physical experiments in the implosion compression and arrest stage,an optical design of Wolter-ⅢX-ray microscope with short focal length and high magnification satisfying the Abbe sine condition was proposed.This paper introduces,the structural characteristics and design method of Wolter typeⅢmicroscope in detail.Compared with Wolter typeⅠmicroscope,the focal length of the system can be reduced by moving the main plane to the direction of the object point,so as to obtain a larger magnification.The image quality matching between microscope and detector is realized to improve the spatial resolution of diagnostic system.It can be obtained by ray tracing that the spatial resolution is better than 3μm in the field of view of±190μm.The resolution is better than 5μm in the field of view of±240μm.In the field of view of±300μm,the resolution is better than 8μm.The geometric solid light angle is about 5×10^(−6) sr.