相衬照相法检测聚苯乙烯微球气泡缺陷

高党忠; 刘元琼; 马小军

doi:doi:10.3788/hplpb20112308.2097

强激光与粒子束, 2011, 23 (8): 2097, 网络出版: 2011-09-20

相衬照相法检测聚苯乙烯微球气泡缺陷

Inspecting micro-bubble in polystyrene shell using phase-contrast imaging

论文大纲

高党忠 ^*刘元琼马小军

作者单位

中国工程物理研究院激光聚变研究中心, 四川绵阳 621900

PS微球相位物体微气泡缺陷相衬照相 polystyrene shell phase object micro-bubble phase-contrast imaging

摘要

利用较高能量的X射线对聚苯乙烯（PS）微球进行离焦相衬成像，球壁内密度变化较大的微小气泡的边缘衬度得到有效增强，从而在灰度变化较平滑的微球整体图像中凸显出来，分析了衬度来源及相关因素。实验采用微焦斑的X射线管及CCD作为光源及探测器，图像分辨力约为2 μm，在能量为20～30 keV时，实现了PS微球缺陷快速检测，为微球制备工艺的改善和提高提供了快速有效的监测手段。

Abstract

Using high energy X-ray defocus phase contrast imaging on polystyrene（PS） microspheres, the contrast of the edge of tiny bubbles (about a few micrometers in diameter) in the sphere’s wall are effectively enhanced, where the density gradient is relatively larger, and thus the bubbles will be highlighted on the image of microsphere which has overall smooth gray scale. The contrast causing and related factors are analyzed and discussed. The experiments conducted use micro-focal spot X-ray tube and CCD as the light source and detector, the derived image resolution is better than 2 μm, and the rapid defect detection of PS shells is achieved at the X-ray energy of 20 to 30 keV, providing a fast and effective means for monitoring of microspheres preparation process.

参考文献

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高党忠, 刘元琼, 马小军. 相衬照相法检测聚苯乙烯微球气泡缺陷[J]. 强激光与粒子束, 2011, 23(8): 2097. Gao Dangzhong, Liu Yuanqiong, Ma Xiaojun. Inspecting micro-bubble in polystyrene shell using phase-contrast imaging[J]. High Power Laser and Particle Beams, 2011, 23(8): 2097.

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