摘要：将X射线成像技术和微光成像技术相结合,设计了组合新型的X射线影像增强系统·为了得到满意的成像性能,在设计前研究了Gd2O2S∶Tb和CaWO4两种X射线屏和SuperS251和SuperS252两种光电阴极之间的四种屏-光电阴极组合的光谱匹配特征,对应的光谱匹配系数值分别为0.644,0.761,0.369,0.571·以光谱匹配曲线及光谱匹配系数计算数据为理论依据,最终选择Gd2O2S∶TbX射线屏和SuperS252光电阴极的组合作为该新型X射线影像增强系统的主要器件,得到了成像性能令人满意的X光机·

摘要：提出从输入辐射和输出响应的概率密度函数角度分析红外焦平面阵列非均匀性问题,并以此建立基于时域统计特性的自适应非均匀校正算法。增益和偏移系数的漂移被看作是离散的缓慢变化的非平稳随机过程。反映输出响应概率密度函数特性的时域直方图被用来计算探测元的增益和偏移系数;自回归模型被用来对未来的增益和偏移系数进行预测。与直接存储图像数据相比,采用时域直方图存储图像的统计信息可以节约大量的存储空间,而且获得时域直方图的方法也非常简单。把算法设计成流水线结构,便可以实现实时的自动漂移补偿的红外热成像系统。真实的红外实验数据说明该算法有显著的非均匀校正效果。

摘要：A novel X-ray imaging system （NXRIS） and the design principles are given in this paper. Different from the existing digital X-ray imaging systems, the X-ray image intensifying system of NXRIS is a non-vacuum system composed of the intensifying screen and the brightness intensifier, and the brightness intensifier is named low light level image intensifier applied in military afffairs. This structure makes NXRIS of big visual field （15 inch, even to larger） and low cost. When designing NXRIS, the spectral compatibility of the component devices and the relation between the visual field and the spatial resolution of tile component devices are analyzed. The images produced by NXRIS are given and the image performance is good enough to be applied to security checking, non-destructive testing, and industry detection.