The purpose of a 3D scanner is usually to create a 3D model. This 3D model consists of a polygon mesh or point cloud of geometric samples on the surface of the subject. These points can then be used to extrapolate the shape of the subject (a process called reconstruction).
What is a 3D scan?
A 3D scan refers to a three-dimensional portrayal of a section of an object’s surface. A comprehensive 3D model emerges from the amalgamation of multiple sets of these scans. Analogous to a two-dimensional photograph comprised of pixels, a 3D scan consists of diminutive triangles or polygons. These polygons congregate to form what is known as polygonal mesh—a precise reproduction mirroring the intricate geometry of the scanned object.
Understanding How a 3D Scanner Works
let’s first understand how 3D scanners work. 3D scanners are devices that capture the geometry and appearance of physical objects or environments using various technologies. These technologies include laser-based scanners, structured light scanners, and photogrammetry, among others. These scanners collect data by measuring points on the object’s surface and create a digital representation known as a point cloud. This point cloud can then be processed to generate a detailed 3D polygonal model.
Common 3D Scanning Applications
If you work with the following, our 3D scanners can improve your product quality, workflows, and cycle times, helping you achieve a faster time to market:
- Inspection and quality control
- Reverse engineering
- 3D printing and rapid prototyping
- CFD/FEA analysis
Inspection:
Part Inspection refers to comparing the values obtained through a measurement device with available references, such as 3D CAD models or 2D drawings, to determine whether a product is acceptable or not.
Reverse Engineering:
With the power of a 3D scanner, engineers can quickly and accurately capture the dimensions and geometry of an object, allowing for the creation of a digital representation that serves various purposes.
Prototyping and Product Design:
3D scanners aid in creating precise digital models that can be used for prototyping, product design, and testing.
What are the different types of 3D scanners?
3D laser scanner: One of the most popular types, uses laser and camera information to create a point cloud of the object’s surface to generate a 3D model.
Photogrammetry: Using camera images to capture images of objects from different angles and then generating 3D depth information by matching pixels.
Structured light scanning: Use a projector to project a light pattern onto the surface of an object and record its distortion, and then use the camera and light pattern information to create model points.
Conclusion
The integration of 3D scanning technology is transforming industries by offering enhanced accuracy, efficiency, and versatility. As technology continues to advance, we can expect even more innovative applications and improved capabilities. Embracing 3D scanners is not just about keeping pace with the competition; it’s about unlocking new opportunities and pushing the boundaries of what’s possible in design, engineering, and beyond.