关于X射线管焦点测量的初步探讨
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摘要
利用X光胶片的感光特性,用两次小孔成像法,设计小型化X射线焦点尺寸测量实验平台,得到了不同条件下的焦斑照片,编写了MATLAB自动焦斑处理程序,计算了不同距离下X射线的焦点尺寸.结果表明在20kV电压、25μA电流下,焦点大小为0.35cm,相同测量距离下,X射线胶片焦斑随着射线管的电压和电流增大而增大.此研究结果为简易和经济型焦点尺寸实验装置的设计提供了参考.
Uitlizing the photographic characteristics of X-ray film,a small-scale experimental platform for measuring the focus size of X-ray was designed by using two small hole imaging method.The focal spot photos under different conditions were obtained.A MATLAB program for processing automatic focal spot was written.The focal spot sizes of X-ray with different distance were calculated.The results show that the focal length is 0.35 cm for 20 kV voltage and 25μA current,and that the X-ray film focal spot was increased with the increase of the voltage of the ray tube and the current for the same measurement distance.A reference for designing a simple and economical focus size experimental device is provided.
Uitlizing the photographic characteristics of X-ray film,a small-scale experimental platform for measuring the focus size of X-ray was designed by using two small hole imaging method.The focal spot photos under different conditions were obtained.A MATLAB program for processing automatic focal spot was written.The focal spot sizes of X-ray with different distance were calculated.The results show that the focal length is 0.35 cm for 20 kV voltage and 25μA current,and that the X-ray film focal spot was increased with the increase of the voltage of the ray tube and the current for the same measurement distance.A reference for designing a simple and economical focus size experimental device is provided.
引文
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[13]李勤,王毅,李成刚,等.滚边法测量高能X射线源焦斑大小[J].强激光与粒子束,2016,28(4):190-195.
[2]谢旭东,陈波,何凌,等.强激光远场焦斑重构算法研究[J].强激光与粒子束,2003,15(3):237-240.
[3]贺元兴,李新阳.正交光楔激光远场焦斑测量方法[J].强激光与粒子束,2012,24(11):2543-2548.
[4]程娟,秦兴武,陈波,等.纹影法测量远场焦斑实验研究[J].强激光与粒子束,2006,18(4):612-614.
[5]王拯洲,王伟,夏彦文.高动态范围激光焦斑测量数学模型研究[J].光子学报,2014,43(10):123-129.
[6]贺元兴,李新阳.基于衍射光栅的远场焦斑测量新方法[J].中国激光,2012,39(2):141-147.
[7]李铭,袁索超,李红光,等.基于数字微镜器件的远场焦斑测量方法研究[J].红外与激光工程,2018,47(5):1-5.
[8]邵欣,邓玉福,马跃,等.X光管的构造、原理及应用[J].沈阳师范大学学报(自然科学版),2012,30(3):354-359.
[9]成金秀,温天舒,杨存榜.X光焦斑测量方法研究[J].光学学报,1999,19(4):50-54.
[10]张催,潘小东,商宏杰,等.X射线管焦点尺寸测量方法研究[J].原子能科学技术,2018,52(2):353-358.
[11]Gao W,Kiyono S.On-machine roundness measurement of cylindrical workpieces by the combined three-point method[J].Measurement,1997,21(4):147-156.
[12]Huang Z,Cao Y,Shi S,et al.A novel telecentricity measuring method for illumination system in lithography based on pinhole imaging[J].Optik-International Journal for Light and Electron Optics,2013,124(12):1234-1238.
[13]李勤,王毅,李成刚,等.滚边法测量高能X射线源焦斑大小[J].强激光与粒子束,2016,28(4):190-195.