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White Ray Vs Blue Ray

Reverse Engineering

Turn parts into CAD with scanning and reverse engineering. We can scan your physical parts and use the resulting mesh to create a 3D model for production or design modification. We can even reverse engineer broken or damaged parts.

After scanning your production parts, we can compare them to your original CAD design to ensure your parts are within tolerance and help identify the cause of any production errors. We can even perform analysis on your tooling to identify wear.

Utilize one of our multiple scanning technologies available, including structured light, laser, touch probe, and more, to get the job done right.

Structured light 3D scanning is a non-contact, optical scanning technology that utilizes light patterns to take measurements of a part and produce a 3D scan. The resulting scans can be used for quality assurance, quality control, and reverse engineering. White light and blue light are the two types of structured light scanners available, but they are often confused as their properties are lumped together under the umbrella term of “structured light scanning”. In this article, we’ll discuss how structured light scanning works, the differences between white light and blue light scanning, and when structured light scanning will work best for you.

Industrial 3D Scanner With Blue Light Technology

ATOS is metrology tested, aerospace certified accurate, and widely recognized as the preferred measuring tool.

The ATOS series of high quality industrial structured blue light 3D scanners provide precision scans with detailed resolution at high speeds.  ATOS is a type of a coordinate measuring machine CMM that utilizes optical non-contact technology to capture millions of accurate points in a single fast scan.  

There are different names for this technology, such as, an optical measuring machine, optical 3D scanner, white light 3D scanner, blue light laser scanner, non-contact 3D scanner, etc.   ATOS is engineered with advanced hardware and intelligent software for repeatable accurate measurements with flexibility and process reliability. 

The ATOS generation of industrial 3D scanners is the most innovative optical measuring system for 3D coordinate measurement on the market. It is widely utilized in various industries, and can measure different object sizes, surface finishes, and shape complexities.

The science behind the technology.

In simplest terms, based on the principles of triangulation, the projector projects a fringe pattern across the part’s surface and as the patterns rapidly shift during each scan, the two cameras capture the displacement to calculate the 3D coordinate measurements.  

In a comparison to a traditional coordinate measuring machine (CMM), which takes a single measurement at each programmed point where the probe contacts the surface of the part, or an industrial 3D laser scanner that gathers measurement in strips or lines of data, ATOS is an optical non-contact measuring system that captures full-field scans of a volumetric area collecting millions of points per scan. 

ATOS setup is minimal and each measurement can take less than 1 second.  It does not require specialized programming skills or highly accurate fixtures.  ATOS discovers discreet problematic areas that would have been undetected by traditional measurement methods by quickly scanning the entire object (part, mold, tool, die, etc.) in an accurate and dense point cloud.

 This digital 3D blue print of the object’s geometry is then compared to CAD with a 3D inspection color map displaying a spectrum of colors that signify areas in and/or out of tolerance.  

As the saying goes, “A picture is worth 1,000 words.”  The 3D color map takes the uncertainty away so the optimal corrective action can be applied eliminating iterations and saving an enormous amount of costs and time that were once being spent on rework.

Highly accurate traceable 3D measurements

Detailed high resolution scans

Quick data collection

Advanced parametric inspection functionality

Complete metrology solution for dimensional analysis (GD&T, trend analysis, industry specific inspection functionality, and much more…)

3D Blue Light Scanning

When scanning your products, we will select the right technology that delivers the accuracy, speed and resolution you need for your application. We also consider the size, color and reflectivity of the object.

In recent years the color of the light from “White Light” has been changed to blue. This is more a marketing issue because studies have shown the color of the light does very little to the data. Our system can be ordered in White, Blue, Green or Red light.

White Light Scanning

When scanning your products, we will select the right technology that delivers the accuracy, speed and resolution you need for your application. We also consider the size, color and reflectivity of the object.

The technologies that we use include laser scanners, white light scanners and CT scanners. The laser scanners are mounted on a ROMER arm or tracked with an NDI optical system. This allows us to capture scan measurements in an area up to 18 feet in diameter and at a rate of nearly 500,000 points per second. The white light scanners, which are mounted on a tripod, capture more than 1,000,000 points per second. In a single shot, the white light scanners take measurements in an area ranging from a few square inches to a few square feet. CT scanners allow for the easy measurement of the internal structures of parts by generating a point cloud from a number of two dimensional x-ray pictures.

Laser or White Light 3D Scanning? Exact Metrology Examines Which is Better for Your Project

When it comes to a discussion about “White Light vs. Laser Scanning”, those unfamiliar with the technologies may believe that we’re about to proceed into an article rating all of the Sci-Fi flicks from the last century. But we save those debates for lunch break. One of the most frequently asked questions the Exact Metrology team gets is: “What is the difference between white light and laser scanning?” And since our customers are often unsure of which would best suit their project, we decided to devote some space in this newsletter discussing the two.

Both 3D white light and 3D laser scanners are used for inspection and reverse engineering purposes. Both are close range scanners that will record data quickly and to a sub-millimeter level of accuracy. But each type of scanner has unique properties that make them more or less fitting for certain applications.

To illustrate the difference between white light and laser scanners, we grabbed your everyday deodorant bottle off the shelf and scanned some of its components using each type of scanner. The differences are illustrated below:

3D White Light and 3D Laser Scanners: The Details

3D white light scanners are usually tripod mounted. Scan data is obtained shot by shot, as a grid of light is projected and laid over the component being scanned. As a scan is completed the grid is modified, and the scanner determines the 3D coordinates by calculating the returned patterns.

3D laser scanners are usually handheld or tripod mounted, and scan data is obtained as a laser stripe sweeps over a component or entire area. The handheld type is typically attached to an arm, which provide a constant readout of where the scanner is at any time.

So Which Do I Need for My Project?

When it comes to white light and laser scanners, there are several important differences one should take into consideration when planning their project. These include:

  • Point Density
  • Speed
  • Accuracy
  • Cost

Point Density – One significant difference in white light scanner and laser scanner results is in point density. To illustrate this example, let’s use the screw and crank from a deodorant bottle.

You can see from this side-by-side comparison the difference in detail the scanners are able to obtain. This detail is obtained not by accuracy but by having points closer together.

If the goal of the scan were to capture data about the general size and dimensions without the intricate details of the screw and dial, the ROMER Arm and laser scanner will capture this general shape. If the goal of the scan is to reconstruct the dial exactly, the white light scanner has point spacing that is much closer and will record the dial with greater detail.

Speed – When it comes to speed and efficiency of a scanner, laser scanners have the advantage of speed, due to the fact that they can do one sweep much more quickly than the multiple shots a white light scanner obtains. For example, the ROMER Absolute RS2 can scan 50,000 points wirelessly, with real-time exposure.

But with the next-generation cameras, electronics and processors now used, white light scanners can now obtain scan data containing over 8,000,000 points in an area as small as 30mm square and in as little as a few seconds. Due to this rapid scanning speed, white light scanners have been found to be incredibly useful in face scanning and body scanning applications, since people often find it difficult to stand still. However when many shots are required to cover the part in points additional time is required.

Accuracy – White light technology is capable of accuracies up to less than 0.001 of an inch in small volumes. Once the volume gets over roughly one foot cubed, the accuracies will match that of the laser scanner at roughly 0.003 of an inch.

Since each job is truly unique, your Exact Metrology rep will advise you on which type of scanning will achieve the greatest accuracy based on your project’s volume.

Cost – A white light scanner is typically more expensive than a laser scanner. While low-cost white light scanners are available, the data they obtain is typically not up to par with that obtained by the higher quality scanners. Therefore, if scan data provided by a laser scanner will meet the needs of a project, this is often the choice our clients go with. If scan data with greater detail is needed, then white light would be a better choice. You can talk with your Exact Metrology representative for a recommendation guaranteed to fit your requirements.

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