the beam from the laser l passes through the shutter s, is spread by the objective lens . 激光器L发出的光束经过快门S,被物镜所扩散。
Alternatively, we can image that the incoming wave is diffracted by the object and the resulting diffracted wave is then diffracted again by the objective lens . 换一种方式,我们可以这样想象:入射波被物体反射,所得到的衍射波再一次受到物镜的衍射。
The second arises from the spherical aberration present in the objective lens 第二个出现在目标透镜的球面像差表面。