optical fourier transformation
in [Matlab]
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From: sonia on 5 Aug 2010 09:30 hello, Please help me to implementate in matlab an achromatic 2D fourier transformation. when the system use a broadband illumination. Regards sonia
From: Joseph on 5 Aug 2010 10:59 This is a massive request for your first posting...what have you done so far? "sonia " <sonia_elwardi(a)yahoo.fr> wrote in message <i3eedl$d45$1(a)fred.mathworks.com>... > hello, > > Please help me to implementate in matlab an achromatic 2D fourier transformation. > > when the system use a broadband illumination. > > Regards > sonia
From: ImageAnalyst on 5 Aug 2010 14:10 sonia: What is an "achromatic 2D fourier transformation"? How does that differ from a regular 2D FT on a 2D array? And MATLAB doesn't do anything optically, just numerically. To do an optical FT, you'd need an optical bench/table with lenses, transparencies, etc.
From: sonia on 5 Aug 2010 18:50 ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <372af4d7-9574-4aba-983b-f92f2263c76a(a)q22g2000yqm.googlegroups.com>... > sonia: > What is an "achromatic 2D fourier transformation"? How does that > differ from a regular 2D FT on a 2D array? And MATLAB doesn't do > anything optically, just numerically. To do an optical FT, you'd need > an optical bench/table with lenses, transparencies, etc. Hi thanks for your answers, I want to implementate my architecture with matlab, to simulate the real properties of each element . I know that the regular 2D FT can be realized with matlab by the function (fft2). In this case, we used a monochromatic light (a single wavelength (lambda0), and the used lens is caracterised by a constant focal distance f). but, when the system is illuminated by a temporally broadband light, there is an interval of [lambda_min ... lambda_max], So we must use an achromatic lens with a variable focal length.... I don't know - haw can I write a broadband ligth in a spatial system. -haw we can write an fft2 when the distance focal change with lamdba. REgards Sonia
From: ImageAnalyst on 5 Aug 2010 19:38
Well, what are your formulas? It's been over 20 years since I got my Ph.D. in optics and I don't remember the formulas off the top of my head. |