摘要
用菲涅耳衍射理论分析圆孔(屏、球)衍射的复振幅分布,根据其复振幅分布式得到的圆孔(屏、球)衍射成像公式与半波带法和矢量法得到的结果一致。并从理论上解释了圆孔衍射和圆屏(球)衍射图样中心的异同和泊松亮斑的成因。这种方法加深了我们对衍射成像过程的认识。
Distribution of complex amplitudes of circular aperture and barrier ＆ sphere diffraction imaging is deduced by Fresnel diffraction theory. And imaging formula accordance with results of half-wave and vector method is obtained by their distribution of complex amplitudes. And the different of phenomenon of circular aperture and barrier ＆ sphere diffraction imaging is theoretically studied and Poisson＇s spot of causes is analyzed. So the method could help ones to understand diffraction imaging＇s process.
基金
国家自然科学基金资助项目
项目编号:10364001
贵州省教育厅自然科学研究项目
项目编号:20090067
关键词
圆孔
圆屏
衍射
复振幅
Circular Aperture
Circular Barrier
Diffraction
Complex Amplitudes
