When I sample a certain digital signal with increasing sampling frequency, the fast Fourier transform of the sampled signal becomes finer and finer. (the image follows) Previously I thought higher sampling frequency makes the sampled signal more similar to the original one, so the Fourier...
As this program is a numerical simulation without any physical units, I think we can just assume the spacing (dk) to be 1 unit. I can also change it according to different sampling rate of the object. In this case the wavelength may also be a number related to the 'unit' defined above, not to...
Thanks for your answer. Maybe I did not explain my problems very clearly.
I guess you used the TEM equipment to show that the diffraction pattern can be Fourier transformed back to the original image. Yet I think that we cannot directly inverse Fourier transform the diffraction pattern...
I am a Grade 11 student and am working on a physics research about Fraunhofer diffraction. I have 2 very basic questions (maybe kind of unprofessional). Hope someone can help.
1.Suppose a beam of coherent, monochromatic, parallel light penetrates an object, and a diffraction pattern forms on...
Thanks for your explanation. I will add my 1-dimensional diffraction pattern program and the result for your reference.
And another question: if the wavelength is one unit length in my program, can I simulate an aperture with diameter less than one wavelength? For example, if I want to create...
Hello, I am using MATLAB to simulate a Fraunhofer diffraction pattern for a given aperture, but I have a little question. Hope someone can help.
Sorry I am just a high school student and does not completely understand all mathematic deductions about Fraunhofer Diffraction on Wikipedia. I...