IS THERE ANY PROBLEM IN THIS PROGRAM OF FRESNEL DIFFRACTION
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Lambda=633*10^-9;
z=10*10^-3;
x=1:150;
y=1:150;
[p,q]=freqspace([1 150],’whole’);
[X Y]=meshgrid(p,q);
R=(X.^2 + Y.^2);
Z=exp(1i.*pi.*lambda.*z.*R);
mesh(Z);
PLZZZ HELP,I CANT FIND..... AND GIVE ME A SOLUTION
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Geoff Hayes
2014-8-9
tulika - are you saying that there is a problem, and if so, what is it? Please format your code so that it is readable. Highlight it and press the {}Code button.
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Star Strider
2014-8-9
I was able to run your code (after correcting the quotes around 'whole' and changing lambda to Lambda in your Z assignment), but it didn’t produce the results I expected.
When I went online to troubleshoot it (the Wikipedia article on Fresnel diffraction is a good source), I also discovered Fresnel diffraction in two steps on stackoverflow. You might take a look at both to see what the problem may be with your code.
4 个评论
Star Strider
2014-8-9
I erased the code I used, but I probably used hold to plot the real and imag parts, and then abs to see if that made a difference. Code ran, but the plotted results weren’t as I’d expected.
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