The principle of the 3d scanner

The 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 became very famous, and they began to be used in medicine, filmmaking, game design and in many other spheres of human activity.

How does an optical 3d scanner work?

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

There are only two basic scan types:

  • Contactless when X-rays or ultrasounds are applied. With their help the image is obtained through the data of the reflected light flux.
  • Contact when the device analyzes the dimensions of the object using physical contact.

Reference! Devices with a contact principle of operation are considered more accurate; however, fragile objects may be damaged during the scanning process with such a device.

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

Reference! Optical models are great for producing three-dimensional models of people or animals.

What materials does it work on?

Optical 3D-scanners in the course of their work use coordinate measuring devices, with the help of which the device builds the finished image. The use of such scanners does not imply "consumables", except for the above-mentioned coordinate-measuring devices.

Watch the video: Explaining 3D Scanning (February 2020).

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