Ren Junchao, Meng Xiangyu, Wang Yong, Cao Jiefeng, Li Junqin, Tai Renzhong
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangheng Road 239, Pudong District, Shanghai 201800, People's Republic of China.
Shanghai Advanced Research Institute, Chinese Academy of Sciences, Zhangheng Road 239, Pudong District, Shanghai 201800, People's Republic of China.
J Synchrotron Radiat. 2020 Nov 1;27(Pt 6):1485-1493. doi: 10.1107/S1600577520010565. Epub 2020 Sep 14.
The mutual optical intensity propagation of partially coherent light through a beamline is calculated for different aperture sizes and positions. The coherence, intensity and phase distribution can be extracted from the mutual optical intensity. The phase distribution depends on the aperture size and position. The results show that the widest flat phase distribution is obtained at the optimized aperture size and position. The aperture plays a more important role for partially coherent light than for incoherent light. The influence of the aperture size and position on the intensity and spot size at the focal plane is also analyzed. A way to obtain a balance between the flat phase distribution area, spot size and intensity for partially coherent light in the beamline is demonstrated.
计算了部分相干光通过光束线时在不同孔径尺寸和位置下的相互光强传播。可以从相互光强中提取相干性、强度和相位分布。相位分布取决于孔径尺寸和位置。结果表明，在优化的孔径尺寸和位置处可获得最宽的平坦相位分布。孔径对部分相干光的作用比对非相干光更为重要。还分析了孔径尺寸和位置对焦平面处强度和光斑尺寸的影响。展示了一种在光束线中为部分相干光在平坦相位分布区域、光斑尺寸和强度之间取得平衡的方法。
