The principle of the 3D scanner: how does the 3D scanner work?

3D-scanner is one of the relatively modern technological inventions that allows you to scan objects in three-dimensional space. The difference between a simple scanner and a 3D scanner, in fact, is that the latter scans works with three axes of space. In fact, immediately after the invention, these devices gained great fame, and began to be used in medicine, film business, game design and in many other areas of human activity.

What is the principle of an optical 3d scanner?

Features of the devices may vary slightly depending on the technology that they use. Basically, the distance to the object is measured by a pair of integrated cameras and exposed lighting, then an image, coming from two angles, are compared, and after processing the received information, the device displays on its display the finished 3D model. As for laser models, in them the model is built on the basis of readings calculated using a laser beam aimed at the object.

There are only two basic types of scanning:

• Non-contact when x-rays or ultrasound are used. With their help, the image is obtained through the data of the reflected light flux.
• Contact, when the device analyzes the dimensions of the item using physical contact.

Reference! Devices with a contact principle of operation are considered more accurate, however, fragile objects can be damaged in the process of scanning with this device.

For optical scanning, class 2 safety lasers are used. The advantage of optical scanners in their speed. In addition, images obtained in this way are not distorted during the scanning process, even if the object is moving. The obvious disadvantage of such devices is that they are not able to scan objects that are either specular or even simply reflecting light.

Reference! Optical models are great for getting 3D models of people or animals.

What materials does it work on?

Optical 3D scanners use coordinate measuring devices in the course of their work, with the help of which the device builds a finished image. The use of such scanners does not imply "consumable" materials, with the exception of the aforementioned coordinate measuring devices.