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 ...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.展开更多
文摘在红外枪瞄系统中,探测器决定着整个系统的性能,为了增强焦平面适应低温操作环境的能力,人们把红外焦平面的低温特性作为了关注的焦点。本文根据对a-Si微测辐射热计焦平面内部的微观电路结构和噪声等效温差(noise equivalent temperature difference,NETD)的分析,经过详细地推导NETD公式,认为可调节两个偏置电压,使焦平面可以在较低的温度下稳定工作。
基金This work was supported by the Nanjing Science and Technology Bureau Program (No. 200308005).
文摘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.
