A 3D scanner is a device that captures the shape and appearance of a physical object and converts it into a digital 3D model. It uses various technologies, such as laser scanning or structured light, to measure the object's dimensions and surface details. This digital representation can be used in various fields, including engineering, architecture, and art. 3D scanners are valuable tools for creating accurate models for design, analysis, and manufacturing. They can scan objects of different sizes, from small items like jewelry to large structures like buildings. The resulting 3D models can be manipulated, printed, or analyzed using specialized software.