Unspecified Xinya Zhang Profile

Xinya Zhang

at Tianjin Univ

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Proceedings Article | 12 March 2024 Poster + Paper

Depth-resolved stress measurement of soft material by polarization-sensitive OCT

Cuiru Sun, Xinya Zhang, Jinlong Chen

Proceedings Volume 12844, 128440F (2024) https://doi.org/10.1117/12.3003553

KEYWORDS: Optical path differences, Tissues, Signal intensity, Biological samples, Biological imaging

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In this study, a method for depth-resolved internal stress field measurement of soft materials using swept-source polarization-sensitive optical coherence tomography (SS-PS-OCT) was proposed. An SS-PS-OCT system based on circularly polarization state was constructed. A depth-resolved dispersion compensation technique was used to improve image quality and the contrast of phase retardation fringes. The stress measurement theory for PS-OCT was derived. A rubber specimen and the double-layer thermoplastic elastomer (TPE) specimen were measured. Stress magnitude results showed good agreement between PS-OCT and tensile measurements with an error of less than 5%. The principal stress direction results showed an error of less than 6%. The PS-OCT-based method for measuring internal stress fields has the potential for measuring the internal mechanical properties of soft materials.

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