圆孔衍射 ( diffraction by a circular aperture )：衍射图象 两个物点距离不同时的成象情况：
双语例句
1
The diffraction phenomena byacircularaperture or a phase plate is analyzed by the boundary diffraction wave theory, the analytic expression of its axial intensity is obtained.
A general diffraction formula for circular apertures is derived. This formula is not limited by the aperture radius and the distance from the screen and can be used as a theory of near field optics.