light-gathering aperture

It is discorered that circular hole diffraction and circular disk diffraction pattern in large aperture convergent beam are different from those of general Fresnel diffraction.

实验中发现,经常使用的大孔径会聚光束的圆孔和圆屏衍射图样不同于一般的菲涅耳圆孔和圆屏衍射图样。

Circular hole diffraction and circular disk diffraction pattern of large aperture angle convergent beam are different from general Fresnel diffraction.

实验发现大孔径角会聚光束的圆孔和圆屏衍射图样不同于一般的圆孔和圆屏衍射图样,本文总结了大孔径角会聚光束的圆孔和圆屏衍射的特点,用简单的几何光学方法给出了定性的解释。