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An innovative method based on optical feedback self-mixing interferometry technique is developed into a system for Young's modulus measurement. The proposed approach utilizes fast Fourier transform to extract the fundamental resonant frequency that is contained in the frequency- and amplitude-modulated self-mixing signal. The system that consists of five modules: sampling, filtering, sensing, impacting...
Self-mixing interferometry (SMI) is a new scheme of interferometry having several advantages compared to standard configurations: it can work with no optical part external to the laser, is self-aligned, is immune to external stray light, and can measure also on target with diffusing surfaces. In this paper, an overview of the several measurements already demonstrated with self-mixing is presented,...
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