Browse Publications Technical Papers 2019-01-1266

Laser Light-Based Technique for Detection and Assessment of Localized Defects in Reflective Automotive Surfaces 2019-01-1266

Surface quality plays an important role on aesthetic appeal of any exterior component of a vehicle. As such, smooth and defect-free are some of the critical characteristics of an automotive surface. Numerous manufacturing-related factors such as production environment, substrate material, coating material, handling is known to generate defects to inherently decrease the overall quality of the external surface. Many of these defects tend to be localized while spreading over large areas of the surface. However, the vast majority of available systems are unable to unequivocally quantify surface defects, and, in most cases, the surface quality assessment is performed in a relative and rather qualitative manner. To address this, the main goal of the present study was to develop a new laser light-based technique capable to detect and quantify the localized defects that are present on the surface of reflective components for automotive exteriors. For this purpose, the setup of the proposed prototypical system was validated through a blend of optical simulations and experiments performed on concave and convex defects with determined geometries and with sizes placed in the sub-millimeter range. This type of knowledge is essential in understanding how the collimated fascicle of light is being redirected after interacting with localized surface defects. Future extensions of this work will target the more general case of globally spread defects of an undetermined shape that are - for instance - characteristic to painted automotive bodies.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Development of an Improved Cosmetic Corrosion Test for Finished Aluminum Autobody Panels


View Details


Nd-YAG laser welding of bare and galvanised steels


View Details


Next Generation 3D Optical Measurements for Manufacturing


View Details