3D Scanning – What is 3D scanning and how does it work?
Interactive Example: Click the above image to control in ‘3D Virtual Reality’. Your touch-screen controls are:Rotate: using a single finger, Zoom IN & OUT: using two finger slide, Move UP/Down: using two fingers).
What is 3D Scanning?
3D scanning is a fast and highly accurate way of acquiring an actual physical real world object. The 3D scanning systems we use make 550,000 surface measurements per second in order to capture an exact 3D digital model of the desired object. Additionally, our scanning system are calibrated on site to ensure a consistent measurement accuracy of up to 0.5mm. We are also able to capture objects in 24-bit colour (ideal for online 3D virtual reality models).
Once an object has been 3D scanned, it can be exported to a digital output device such as a 3D Printer or CNC Milling Machine, in order to then produce an identical physical model at the required scale. See more 3D Virtual Reality models created from 3D scans by clicking here
Above is photo of the original vase that we have 3D scanned.
How Does 3D Scanning Work?
One of the central concepts in laser 3D scanning is time-of-flight. This refers to the use of a laser range-finder, in order to time the round trip of a light pulse travelling from the scanner to the object and back again. Since the speed of light is a known constant, the distance between the scanner and the object can be accurately calculated by measuring the time it takes for a pulse of light to return to the scanner. Hence, the formula for calculating distance based on time-of-flight is:
Hence, the accuracy of a 3D scanners time-of-flight sensor depends on the accuracy of the scanner’s internal chronometer. A key advantage of laser scanners is their ability is accurately measure longer distances. This is why they tend to be used for large-scale surveying applications. However, accurately measuring a pulse of light traveling at 186,000 miles per second is still very challenging.
3D Scanning – How Triangulation Works
Most 3D handheld scanners use triangulation to off-set the diminished accuracy that comes with time-of-flight measurements.
Some handheld laser scanners incorporate a camera that tracks the laser light projected onto scanned surface. This enables the 3D scanner to triangulate the distance of the objects much more accurately than with time-of-flight measurements alone. However, although triangulation enables higher accuracy, it also limits the effective range of the scanner, which is another key consideration.
A Full Range Of 3D Scanning Services
Superscan3D provide a full range of 3D digital services, which enables us to deliver our customers with a complete end-to-end service. Find out more
- 3D Scanning Services
- 3D Digital Model Clean-Up
- 3D Printing Services
- CNC Milling Services
- 3D Digital Assets