A 3D scanner is a device that collects three-dimensional data by scanning an object. The collected data together with a 3D printer can be used to create a physical model, making it possible to duplicate a three-dimensional object. The scanner also allows a comparison to be made of the 3D data it collects and the physical object, so quality can be inspected.

There are two main types of 3D scanning methods: contact and noncontact.

The contact method creates 3D data when a sensor or probe is used to touch the 3D object to be scanned. This method has long been around and can be used to perform a 3D scan of complex shapes that cannot be scanned using the noncontact method. However, it is not possible to scan internal structures or parts that are too deep for the sensor to contact properly. This method also has disadvantages in that scans take a long time to complete and large objects cannot be scannned.

The noncontact method generally entails scanning with either a light, known as structured-light scanning, or a laser, known as laser scanning (or laser beam scanning). Structured-light scanning allows for highly accurate scanning in a short time but requires that it be conducted in a dark place. Laser scanning takes longer and is less accurate than structured-light scanning, but it is more cost-effective and can scan in bright locations.

3D Scanning / 3D Scan

3D Laser Scaner