衍射：当光束靠近经过不透明表面，如镜头光圈的叶片时，它会散开。
Diffraction: When light rays pass close to opaque surfaces, such as the blades of a lens diaphragm , they are scattered;
衍射：当光束靠近经过不透明表面，如镜头光圈的叶片时，它会散开。
Diffraction: When light rays pass close to opaque surfaces, such as the blades of a lens diaphragm , they are scattered;
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