holographic interferometry

Holographic interferometry is a precise imaging technique used to detect minute changes or deformations on an object's surface. It involves creating a detailed 3D hologram of the object using laser light. When the object experiences small shifts—due to stress, heat, or other factors—the hologram can be compared to a reference. By analyzing the interference patterns between the original and modified holograms, engineers can visualize and measure tiny displacements or surface changes with high accuracy, making it a valuable tool in engineering, material testing, and structural analysis.