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About ptychography

Figure : Left : series of intensity diffraction patterns. Right : Reconstructed object (phase and amplitude).

Ptychography is an imaging technique that uses a series of diffraction patterns recorded when illuminating a sample at different locations. Then, a quantitative picture of the object (amplitude and phase) can be reconstructed numerically. Initially developed and widely exploited in electron and X-ray microscopy, it has been recently successfully adapted to the optical range.