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I am a student and trying to design an aperture from which a light will pass will project on a sensor. I tried to find some software simulation tool for this purpose where i can draw the aperture (entrance side) and put diffuser or lens and then see the response of the light for some specific wavelength. I found one tool "Synopsys Code V" but it is very paid solution. So can anyone tell me some substitute for this. I am looking for Free simulation tools.

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marked as duplicate by tpg2114, Brandon Enright, Qmechanic Mar 6 '14 at 5:53

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possible duplicate of Software for geometrical optics –  tpg2114 Mar 6 '14 at 4:55
There's two possible duplicates: physics.stackexchange.com/q/6682, physics.stackexchange.com/q/38865 –  tpg2114 Mar 6 '14 at 4:55
@tpg2114...The link u mentioned have links for software tools which only helps in making drawing but not simulation tools...i want to see real-time response also. –  Saad Saadi Mar 6 '14 at 5:08
I have experience with OSLO, it is not very user-friendly but it works and they have a free version for students. Refraction index is wavelength-dependent, if this is what you need. –  gigacyan Mar 7 '14 at 7:47