I know some (rudimentary) harmonic analysis and am familiar with the Shannon-Nyquist theorem but I'm not sure I follow. Care to explain?
Edit: nevermind, I got it [1]. I see, however, the result only holds 'modulo' paraxial waves well-behaved in the linear regime... So it's not that every lens automagically computes a FFT at the speed of light as it seemed at first!
Edit: nevermind, I got it [1]. I see, however, the result only holds 'modulo' paraxial waves well-behaved in the linear regime... So it's not that every lens automagically computes a FFT at the speed of light as it seemed at first!
[1] https://en.wikipedia.org/wiki/Fourier_optics#Fourier_transfo...