Hi, Today I was told that phase and amplitude on the screen in a far field of a mask consisting of hole are more or less the same. So, I wanted to check myself, but didn't find any resource for this. All the resources are, as usual, talk about intensity distribution in the Fourier domain, but not phase. I'll give an example: Lets say I have a mask with 1 small hole. The Fourier transform will give me a SINC. So the amplitude is SINC function, but what a phase is? I need both amplitude and phase in order to FFT again and reconstruct the initial image. Can someone provide me a link or suggest a book, where I can view amplitude and phase after FFT for different masks? Like: One slit: Amplitude - Sinc(...), Phase - ... Two slits: Amplitude - Sinc(...)*Cos(...), Phase - ... Circular aperture: Amplitude - Jinc(...), Phase - ... Thanks!