Optics Japan 2003

9pA9 Violeta Madjarova


This paper presents dynamic ESPI system for studying thermal expansion of joint material. For the quantitative analysis of the interference signal we propose a Hilbert Transform method. The data processing is performed in temporal domain, considering the temporal history of the interference signal at each pixel. The method enables a fully automatic processing. The final results give a temporal development of two-dimensional deformation field. The dynamic range of measurements is increased from several tens of nanometers to several micrometers, which makes the method very attractive for dynamic measurement.

Optical Society Of Japan
An Affiliate of the Japan Society of Applied Physics