Irradiance distribution of an optical system with Gaussian source using fft functions

As of now I have a 2-D array defined as my aperture function and I also have a 2-D array defined as a Gaussian function (light source). I am trying to create the irradiance distribution in a 2-D array where I can see it visually, using the exact scalar method.

I believe that I know how to do this with a uniform input due to some simplifications in the mathematics, however I'm not sure how or where to include the Gaussian input. My intuition says that there should be a convolution included somewhere, but I'm not quite sure. Any help would be greatly appreciated. I'm not necessarily looking for any specific code, just the correct way to go about solving or incorporating the Gaussian source.

Thanks!

[Mounika]

hello if you had done already kindly upload the mfile for the 2D array irradiation distribution of light source. I am new to matlab and i have just started working on this, help would be appreciated.

Answer 1

[Image Analyst]

So you have a light source shining though a hole in an opaque screen? I think you need to take into account both the distance of the observation plane from the aperture plane, and the distance of the light source from the aperture plane. Maybe you should ask in the sci.optics newsgroup first to get the theoretical equations, then after that we can help you with the MATLAB part.