v*a
发帖数: 14 | 1 一束相干光经过不同焦距的凸透镜,焦平面的光场分布一定一样吗?是不是就是入射光场的
傅立叶变换? | s*****c
发帖数: 753 | 2 Actually, there is approximation involved in expanding the integral.
Therefore, it is not accurate. Esp. at near field (short focus).
Well, you don't expect the focal plane is really a perfect flat plane, do you?
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