hello @Hugues, 3DRACS has 2 modules for 3D Scanning, Virtual 3D Scanner is for researchers, developers, students, simply its for learners, it is not for you.
To understand what is Virtual 3D Scanner, you should watch this video...
http://www.youtube.com/watch?v=1EDNlS41MjM .. you will see a low resolution CAD module is imported into the Virtual Scanner and Virtual Scanner scans that model in very high resolution. (3D CAD model to 3D CAD model)
Structured Light 3D Scanning module is to perform real-world 3D scanning, you need a projector and a camera for this. (3D real-world model to 3D CAD model).
Hope its clear now.