Enhancement of surface inspection by Moiré interferometry using flexible reference gratings



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Quiroga Mellado, Juan Antonio and Martínez Antón, Juan Carlos and Canabal Boutureira, Héctor and Bernabeu Martínez, Eusebio and Álvaro Labajo, M. and Cortés Testillano, V. (2001) Enhancement of surface inspection by Moiré interferometry using flexible reference gratings. Optics Express, 8 (12). pp. 649-654. ISSN 1094-4087

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Official URL: http://dx.doi.org/10.1364/OE.8.000649


We have extended the use of shadow Moiré technique to be implemented in simple curved surfaces by using a flexible grating. Dynamic visual inspection of surface micro-damages is significantly favored by the use of well adapted pliable gratings compared to the use of flat reference gratings. The experimental set-up consists of a plastic foil with a printed Ronchi grating stretched between three points which adapts to any cylindrical or conical convex surface independently of the relative orientation grating/surface. Static quantification of defects profiles is also possible with an attached CCD camera. Visual detection of defects in the range of ~30 μm in depth is obtainable.

Item Type:Article
Additional Information:

©2001 Optical Society of America.
This work has been developed and supported within the framework of the European Project INDUCE: Advanced Integrated NDT Concepts for Unified Life-Cycle, ref. BRPR-CT98-0805.

Uncontrolled Keywords:Shadow Moiré, Topography
Subjects:Sciences > Physics > Optics
ID Code:23160
Deposited On:15 Oct 2013 11:53
Last Modified:07 Feb 2014 10:57

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