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pjbeierle
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I know one can find the "near field" length of an illuminated diffraction grating by calculating the Talbot Length, but I also know this is not the complete story. What happens when you have instead a light source (like a laser beam) that coherently illuminates a certain number of grating bars/slits , say 8 or 9 open slits. How would one calculate the length of the near field then? it seems that the near field length would increase with the number of slits you coherently illuminate.
Can someone provide me with a better equation or method for finding the near field length?
Thanks in advance
Can someone provide me with a better equation or method for finding the near field length?
Thanks in advance