Phase retrieval techniques

Phase retrieval techniques are methods used to reconstruct a signal or image when only the intensity (or magnitude) information is available, and the phase information is missing. This situation often occurs in fields like optics and microscopy, where detectors capture light intensity but not the phase, which is essential for accurate imaging. These techniques apply mathematical algorithms to infer the missing phase data from the known intensities, allowing the complete signal to be reconstructed. Essentially, they solve the puzzle of how to recreate the original image or wavefront from incomplete information, enabling clearer, more detailed visualization in various scientific and technological applications.