A laser scanner is a device that uses laser beams to capture the precise shape and size of an object or environment. It works by emitting laser light and measuring the time it takes for the light to bounce back after hitting a surface. This information is then used to create a detailed 3D model, which can be used in various fields such as architecture, engineering, and archaeology. Laser scanners can be stationary or handheld, making them versatile for different applications. They are often used in conjunction with software to analyze and visualize the scanned data. This technology is essential for creating accurate representations of complex structures, such as buildings or historical sites, and is commonly used in industries like construction and heritage preservation.