945 lines
81 KiB
Text
945 lines
81 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<head>
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<h1 class="nist-page__title">High-speed, 3D volumetric displacement and strain mapping in soft materials using Light Field Microscopy</h1>
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<div class="nist-field__label">Published</div>
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<div class="nist-field__item"><time datetime="2022-09-02T12:00:00Z">September 2, 2022</time>
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<h3 class="nist-field__label">Author(s)</h3>
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<div class="nist-field__item">Selda Buyukozturk, <span class="nist-author">Alexander Landauer</span>, Jing Zhang, Luke Summey, Angel Chukwu, Christian Franck</div>
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<h3>Abstract</h3>
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Background: High strain-rate deformations of soft materials have several applications which presents an experimental need to measure at-rate 3D volumetric spatial information. While 2D- and 3D-digital image correlation, digital volume correlation, and particle tracking techniques have been able to reconstruct full-field displacements with great resolution, experimentally obtaining volumetric information and applying these techniques at high rates remains a significant challenge, especially at small, micrometer length scales. Methods: To conduct 3D volumetric imaging at high (100 Hz to 10 kHz) or ultra-high rates (10+ kHz) we designed a full-field volumetric light-field microscopy system paired with post-processing and volumetric particle tracking routines to quantify 3D volumetric deformations. Light field microscopy uses the principles of low-angle tomographic volume reconstruction with a microlens array to generate parallax within a single 2D image, which is used for volume reconstruction of a transparent material seeded with fluorescent particles. The algorithm then segments and localizes the particles, and tracks the cumulative motion of the particles throughout a reconstructed image volume. Results: To validate the technique, both synthetic images and gels with embedded particles underwent deformations at high strain-rates.We simulate the light-field representation of particles undergoing motion with ray tracing and investigate the sensitivity and noise floor of the measurement technique. In experiments, a custom-built simple shear device deformed the gel at assorted applied strain rates, while light-field images were collected at between 500 frames per second and 2000 frames per second. Conclusion: By combining light field microscopy with our recently developed topology-based 3D particle tracking algorithms we demonstrate accurate resolution of volumetric displacement fields in soft, transparent materials undergoing high rate deformations.
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<div class="nist-field__item">Experimental Mechanics</div>
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<div class="nist-field__item"><a href="https://doi.org/10.1007/s11340-022-00885-z" target="_blank">https://doi.org/10.1007/s11340-022-00885-z</a></div>
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<h3 class="nist-field__label">Keywords</h3>
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<div class="nist-field__item">Light Field Microscopy, High speed tomographic imaging, Particle tracking, 3D deformations</div>
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Buyukozturk, S.
|
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, Landauer, A.
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, Zhang, J.
|
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, Summey, L.
|
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, Chukwu, A.
|
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and Franck, C.
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(2022),
|
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High-speed, 3D volumetric displacement and strain mapping in soft materials using Light Field Microscopy, Experimental Mechanics, [online], https://doi.org/10.1007/s11340-022-00885-z, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932900
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Created September 2, 2022, Updated November 29, 2022
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