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Originally Posted by janoskiss
Fourier computer = lens. Analog computing at its finest.  |
No it is far more complex that that.At the back focal plane of a good lens with coherent light,the Fourier transform exists.Filters can be put there to modulate
and deconvolute to obtain the desired information.Then another equally good lens to reconstruct the result.Yes a very quick analogue computer.I remember when an FFT took hours,now my laptop does it in milliseconds.Now people are too busy to see the beauty.
Bert