How Do 3D Scanners Work?
A 3D scanner is a non-contact metrology tool that captures the geometry and surface appearance of real-world objects and converts them into digital 3D models, also known as digital twins. There are various 3D scanners, but they generally work using one of two methods: structured light scanning or laser scanning.
In structured light 3D scanning, the 3D scanner projects a pattern of light onto an object's surface and then measures the distortion of the reflecting pattern. The scanner uses a camera or set of cameras to capture multiple images of the distorted pattern from different angles. Then, 3D scanning software reconstructs the 3D shape of the object based on the captured images, resulting in a geometric digital twin of the physical object.
On the other hand, laser scanning uses a laser to scan the object and create a 3D point cloud, which is a set of millions of individual points in space that represent the object's surface. The laser scanner emits a laser beam that sweeps across the object, and a sensor detects the reflection of the laser light. The scanner then calculates the distance between the scanner and the object's surface at each point, creating a 3D representation of the object.
After the 3D data is captured, it is typically processed using specialized software to clean up any noise or errors and create a final 3D model, also known as a digital twin. This model is useful in various applications, such as 3D printing, computer-aided design (CAD), virtual reality, and more.
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