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Paint Drying Process Monitored by Digital Holography and Estimation of Tack-free Time

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Abstract

A paint drying process of a three dimensional surface is assessed by phase-shifting digital holography. In the method, it is possible to visualize and to evaluate local variations of drying without any contact on the object and imaging system. In addition, a quantitative analysis utilizing the amplitude and phase changes derived from the reconstructed complex amplitudes of the reflected light from the paint surface is performed and the time of tack-free drying of the paint under different temperature is investigated by comparing the microscopic monitoring and conventional gravimetric methods.

© 2011 Optical Society of America

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