Talbot-lnterference

Talbot interference is a phenomenon where light passing through a series of evenly spaced slits or a grating creates a repeating pattern of bright and dark spots, known as self-images, at regular distances called Talbot lengths. This occurs because the light waves diffract and interfere constructively or destructively at specific intervals, forming a predictable pattern that replicates the original structure. The effect demonstrates how wave properties of light lead to diffraction patterns and has applications in imaging, optical metrology, and the design of photonic devices.