Fig. 1: Schematic of pyramid diffractive optical networks for unidirectional image magnification and demagnification.
From: Pyramid diffractive optical networks for unidirectional image magnification and demagnification
a Comparison of a regular D2NN design and a P-D2NN design, where the P-D2NN has smaller degrees-of-freedom (DoF, i.e., the number of independent diffraction-limited features) than the regular D2NN. b P-D2NN for unidirectional image magnification. The diffractive network performs image magnification in the forward direction (\(A\to B\)) and image blocking in the opposite direction (\(B\to A\)). c P-D2NN for unidirectional image demagnification. The network performs image demagnification in the forward direction (\(A\to B\)) and image blocking in the opposite direction (\(B\to A\))
