[Micanthus]

> a lens is a Fourier transformer. Of a sort.

Can you expand on that? Or have some reading for that?

I guess it makes sense, light is a wave and anything even vaguely to do with waves seems to end up with Fourier transforms, but still I'm curious about the details

[infogulch]

How about a practical demonstration of optical Fourier transforms?

https://www.youtube.com/watch?v=Y9FZ4igNxNA