A 3D scanner is a device used to capture the physical geometry of an object and create a digital 3D model. It employs various technologies, such as laser, structured light, or photogrammetry, to accurately capture the shape, texture, and dimensions of the object. The scanner emits signals or captures images from multiple angles, which are then processed to generate a detailed 3D representation. 3D scanners find applications in numerous fields, including engineering, design, healthcare, and entertainment. They enable reverse engineering, quality control, virtual prototyping, and 3D visualization.