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Sprayless 3D Computer-Aided Verification Tool for Plastic

A recent study of Polymers proposed a novel, environmentally friendly three-dimensional technology for optical inspection. This allows accurate 3D optical inspection without spraying an anti-glare mixture on the surface of a component.

Study: A Robust Three-Dimensional Computer-Aided Verification Technique for Plastic Parts. Image Credit: Simon Kadula/

Plastic parts are important in energy conservation and energy storage. Compared to metal, plastic products have several benefits, including lower production costs, waste, part weight, and higher corrosion resistance.

Disadvantages of Spraying Anti-Glare Mixture on Surface Scanning

Spraying an anti-glare mixture of ethanol and TiO2 powder on top of the scan has many shortcomings. Spray time for a mixture of ethanol and TiO2 The powder increases as the size of the measuring object increases.

Spraying the anti-glare mixture in large quantities will increase the cost of the initial job.

Removing the anti-glare mixture is time-consuming if the measured surface has minute pores or cracks. Finally, the measuring object may be damaged if the spraying mixture is removed after the 3D optical measurement.

Benefits of Scanning Without Spraying and Anti-Glare Mixture

Do not spray an anti-glare mixture of ethanol and TiO2 The powder on the scanning surface has many benefits, including no damage to the tested object, reduced setup time before the 3D optical scan, and reduced cost.

Non-Contact Measuring Approach

Compared to metal parts, plastic parts can fulfill the functional requirements of a new product. The plastic surface is not reflective. It is difficult to perform 3D optical inspection of transparent plastic objects, according to practical experience in the industry. Plastic components can be measured by two methods: the conventional contact measurement method and non-contact measurement method.

The non-contact measurement method offers a better measurement efficiency than the conventional contact measurement method, which is why it is so widespread in current polymer engineering. The non-contact computer-aided verification method is often used in the plastics industry because it has higher measurement efficiency than the standard contact measurement method.

A non-contact GOM ATOS Triple Scan II optical 3D scanner is used frequently in various engineering procedures because it uses structured blue light to make accurate scans with high speed and detailed resolutions.

Sensors are now being developed as adaptable 3D scanners for challenging inspection duties in various industries. To achieve maximum accuracy and make an optical 3D measurement, the standard engineering practice is to matte the object to be measured by misting it with an anti-glare titanium oxide compound. (TiO2) powder and ethanol.

Development of Non-Contact Computer-Aided Verification Technique

kuo and so on. Propose a unique, environmentally friendly 3D computer-aided verification (CAV) method using an ATOS optical 3D scanner, which enables exact 3D optical inspection of a measured object without spraying a mixture of ethanol and TiO2 powder.

In engineering practice, the ATOS sensor must be calibrated using a calibration framework before optical measurement. To eliminate unwanted reflections during optical measurements, researchers spray the surfaces of measuring objects for calibration purposes.

For the 3D optical measurements in this work, the researchers used two lenses and a rotating stage. The GOM 3D program changes the quality, resolution, area, and exposure of the scanned data.

The main purpose of following reference points on the surfaces of the measuring component is to enable the scanning probe to remember the relative location of the measuring object. Thus, the number of reference points can be overlaid on the scanned data. The results obtained are added to the empirical technical database for accurate 3D optical measurements of objects with non-sprayed surfaces.

Research Findings

Plastic items are strong and light and satisfy all customer needs. For measuring objects with straightforward or complex shapes, non-contact measuring systems work well. The aim of the work is to propose a cutting-edge, environmentally friendly 3D CAV method using the ATOS optical 3D scanner. When used with non-sprayed ethanol and TiO2 powder surfaces, this method enables accurate 3D optical measurements.

The researchers discovered that the findings of the study met the sustainability development standards because the dimensional average inaccuracy of the two plastic pieces was kept under control at about 3 µm and 4.7 µm. Research findings have industrial application and practical significance.


The surprising results of the study are useful and offer the plastic industry the most potential use because they show the precise 3D optical measurement of objects without spray.

Due to the creation of an empirical technical database for accurate 3D optical measurements of objects with non-sprayed surfaces, the results of the research achieve the objectives of the SDGs.


Kuo, C.-C., He, Z.-Y., & Lee, C.-X. (2022). A Robust Three-Dimensional Computer-Aided Verification Technique for Plastic Parts. Polymers, 14(15), 2996.

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

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