Open AccessMeasurement of depth-resolved thermal deformation distribution using phase-contrast spectral optical coherence tomography
Author(s) -
Yun Zhang,
Bo Dong,
Yulei Bai,
Shuangli Ye,
Zhenkun Lei,
Yanzhou Zhou
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.028067
Subject(s) - optics , materials science , optical coherence tomography , refractive index , deformation (meteorology) , thermal expansion , tomography , thermal , coherence (philosophical gambling strategy) , composite material , physics , meteorology , quantum mechanics
An updated B-scan method is proposed for measuring the evolution of thermal deformation fields in polymers. In order to measure the distributions of out-of-plane deformation and normal strain field, phase-contrast spectral optical coherence tomography (PC-SOCT) was performed with the depth range and resolution of 4.3 mm and 10.7 μm, respectively, as thermal loads were applied to three different multilayer samples. The relation between temperature and material refractive index was predetermined before the measurement. After accounting for the refractive index, the thermal deformation fields in the polymer were obtained. The measured thermal expansion coefficient of silicone sealant was approximately equal to its reference value. This method allows correctly assessing the mechanical properties in semitransparent polymers.