Speaker
Description
In this research talk, we delve into the intricacies of selected optical measurement techniques applied to experimental mechanics of complex and big (in relation to the actual field-of-view) objects. The focus is on two major approaches: multimodal measurements and synthetic aperture. We explore the challenges faced by two groups of experimental methods: (i) digital image correlation (or shearography) combined with structured light and spectral methods dedicated to scattering objects and (ii) digital holographic microscopy/phytography (2D measurements and monitoring) or optical diffraction tomography (3D measurements and monitoring) also combined with spectral methods dedicated to weakly scattering phase-amplitude objects. These two groups have very different applications, namely the first group – big engineering or cultural heritage objects and the second – technical or biological transparent or quasi-transparent micro-objects, however, the metrological challenges (accuracy, reliability, and efficiency of the methods) are similar. Through a comprehensive analysis, we shed light on the advancements and practical implications of applying multimodal and synthetic aperture approaches in the measurements of full-field, mechanical features of investigated objects. We focus on the problems of the determination of a common coordinate system for data distributed in space, time, and modalities. Also, we discuss the need of standardised procedures and calibration bodies for these complex measurements.
