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By combining a high-resolution image from a standard camera with a low-resolution light-field image from a lenslet array, we numerically reconstruct a high-resolution light-field image. We experimentally demonstrate the method by creating a high-definition 3D image of a human cheek cell with a commercially available microscope.

We extend the Gerchberg–Saxton algorithm to phase retrieval in a nonlinear system. Using a tunable photorefractive crystal, we experimentally demonstrate the noninterferometric technique by reconstructing an unknown phase object from optical intensity measurements taken at different nonlinear strengths.