Laser Scanner vs Structured Light Scanner: which should you choose?

In the 3D printing workflow, 3D scanners are very often an essential step to facilitate the modeling of an object. They make it possible to collect data on the shape and sometimes depending on the 3D scanner, the appearance (such as colours). Therefore, 3D scanning enhances the design process, speeds up and reduces errors in data collection and also saves time and money.

3D scanning can be based on different technologies, each with their own benefits & limitations. In this article we explore the two main technologies used for 3D scanning for 3D printing, in other words, laser triangulation and structured light. So, how do laser scanners compare to structured light scanners? And most importantly, which one should you choose for your project?

Laser Scanners: technology, benefits and limitations

Laser scanners are based on trigonometric triangulation to accurately capture a 3D shape as millions of points. More precisely, they work by projecting a laser point or line onto an object and then capturing its reflection with sensors. Since the sensors are located at a known distance from the laser’s source, accurate point measurements can be made by calculating the reflection angle of the laser light. With the knowledge of the distance of the scanner from the object, the scanning hardware can map the surface of the object and thereby record a 3D scan.