Fourier Transform, Optical Computing, Free Space Optics.
transforms, but significantly more efficient. From 1D to 3D (and more) We have shown that a 2D Fourier engine can be used to compute large 2D or 1D FTs. But are we limited to these two dimensions? Fortunately, no: we can combine 2D and 1D transforms to compute higher-dimensional ones. For instance,