A lens can perform the Fourier transform! 🔍
This is the 4F system: the first lens converts an image into its frequency components, and the second lens reconstructs it. By adding an aperture at the Fourier plane, we can filter out high frequencies.
#Optics#Physics#b3d
It took me years to realize that pre-Columbian architecture is related to structure of corn kernels. In western model of thought, one might judge shapes as irregular, but in universal thought, everything is a correlation between cosmos, science, art and humanity. - Juan Casco