Proceedings ArticleDOI
Quantitative evaluation of blisters in polymer-coated steels by three-dimensional optical reconstruction
Z. Milena Perez,Lenny A. Romero,Jaime E. Meneses +2 more
- Vol. 5622, pp 166-171
TLDR
In this paper, an optical system of three-dimensional reconstruction for the detection quantitative evaluation of blisters in polymer coated steel was implemented, which explores a region of 4 x 3 mm with a resolution of 10 μm, using the fringe projection method.Abstract:
In the industrial application field, the presence of blisters in coated steel is an important quality factor of the protection coating applied on the surface. In this work, an optical system of three-dimensional reconstruction for the detection quantitative evaluation of blisters in polymer coated steel was implemented. The implemented optical system explores a region of 4 x 3 mm with a resolution of 10 μm, using the fringe projection method. The experimental evaluation was realized using six test samples of different protection coating. The test samples were continually exposed to controlled saline atmospheres and they were periodically measured. The presence of first blisters on the surface was determined. Also, the quantitative parameters were measured as maximum height and mean width of blisters, after 566 hours of exposition.© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.read more
Citations
More filters
Proceedings ArticleDOI
Generalized phase-shifting interferometry
Guanming Lai,Toyohiko Yatagai +1 more
TL;DR: In this article, a generalized phase shifting interferometiy is proposed, where the reference phase, instead of being setto predetermined values, is directly evaluated at each time the interference fringe data are read.
Aproximación espacio-temporal para la medida absoluta de la forma 3d de un objeto por proyeccion de franjas
Z. Pérez,Jaime Meneses +1 more
TL;DR: In this paper, a metodologia que permite calcular la fase continua absoluta de un diagrama de fase discontinuo, sin utilizar procesamiento espacial, is presented.
References
More filters
Journal ArticleDOI
Overview of three-dimensional shape measurement using optical methods
TL;DR: An overview of 3-D shape measurement using various optical methods, and a focus on structured light tech- niques where various optical configurations, image acquisition technology, data postprocessing and analysis methods and advantages and limitations are presented.
Proceedings ArticleDOI
Generalized phase-shifting interferometry
Guanming Lai,Toyohiko Yatagai +1 more
TL;DR: In this article, a generalized phase shifting interferometiy is proposed, where the reference phase, instead of being setto predetermined values, is directly evaluated at each time the interference fringe data are read.
Journal ArticleDOI
Optical roughness measurements with fringe projection.
TL;DR: It is demonstrated that the fringe projection technique allows very fast three-dimensional surface inspections, and a modular measuring instrument is demonstrated, especially the comparability with a tactile sensor and with other optical sensors.