Non-destructive analysis of flake properties in automotive paints with full-field optical coherence tomography and 3D segmentation

Zhang, Jinke and Williams, Bryan M. and Lawman, Samuel and Atkinson, David and Zhang, Zijian and Shen, Yaochun and Zheng, Yalin (2017) Non-destructive analysis of flake properties in automotive paints with full-field optical coherence tomography and 3D segmentation. Optics Express, 25 (16). pp. 18614-18628. ISSN 1094-4087

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Abstract

Automotive coating systems are designed to protect vehicle bodies from corrosion and enhance their aesthetic value. The number, size and orientation of small metallic flakes in the base coat of the paint has a significant effect on the appearance of automotive bodies. It is important for quality assurance (QA) to be able to measure the properties of these small flakes, which are approximately 10μm in radius, yet current QA techniques are limited to measuring layer thickness. We design and develop a time-domain (TD) full-field (FF) optical coherence tomography (OCT) system to scan automotive panels volumetrically, non-destructively and without contact. We develop and integrate a segmentation method to automatically distinguish flakes and allow measurement of their properties. We test our integrated system on nine sections of five panels and demonstrate that this integrated approach can characterise small flakes in automotive coating systems in 3D, calculating the number, size and orientation accurately and consistently. This has the potential to significantly impact QA testing in the automotive industry.

Item Type:
Journal Article
Journal or Publication Title:
Optics Express
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
136981
Deposited By:
Deposited On:
23 Oct 2019 10:05
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Oct 2020 09:23