ICF流体力学不稳定性实验中调制传递函数的测量  

Modulation transfer function measurement in ICF hydrodynamic instability experiments

作　　者：袁永腾[1] 缪文勇[1] 丁永坤[1] 赵宗清[1] 郝轶聃[1] 曹柱荣[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2009年第2期245-248,共4页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目;高温高密度等离子体物理国防科技重点实验室基金项目(9140C6801020801)

摘　　要：在流体力学不稳定性实验中,实际X光强度分布经过成像系统后会发生改变。要准确得到实际的光强分布,必须对系统的调制传递函数进行精确地测量。通过对刀口图像分析得到了系统的线扩散函数,再对其进行傅里叶变换得到调制传递函数,最后通过维纳滤波和约束最小二乘方滤波两种方法对图像进行了重建,得到比较清晰的边界情况和图像轮廓。In hydrodynamic instability experiments, the X-ray intensity distribution will change after passing through the imaging system. In order to acquire the actual X-ray distribution, the MTF of the imaging system have to be measured accurately. The line spread function（LSF） of the imaging system was given by analyzing the edge image. The fourier transform of the LSF is the MTF of the imaging system. The image reconstruction was completed using Weiner filtering and constrained least square filtering. The boundary of the reconstruction image is clear.

关 键 词：ICF 流体力学不稳定性 调制传递函数 线扩散函数 点扩散函数 图像重建 边缘扩散函数 

分 类 号：O534[理学—等离子体物理]