Iterative phase retrieval

Iterative phase retrieval is a method used to reconstruct an image or object from measurements that only capture the intensity (brightness) of a light wave, not its phase (the wave's position). Since phase information is lost, the process involves making an initial guess of the phase, then repeatedly refining it by comparing the predicted measurements with the actual data. This cycle continues until the reconstructed image accurately matches the observed measurements. It’s commonly used in microscopy and imaging techniques to recover detailed images from limited or incomplete data, improving our ability to analyze structures at very small scales.