Dual-channel phase-contrast spectral optical coherence tomography for simultaneously measuring axial and normal to B-scan off-axial displacements

作者：Dong, Bo; Zhang, Yun; Ye, Shuangli; Zhou, Yanzhou; He, Zhaoshui; Xie, Shengli^*

来源：Optics and Lasers in Engineering, 2017, 96: 35-38.

DOI：10.1016/j.optlaseng.2017.04.007

• Depth-resolved displacement field
• Axial displacement
• Off-axial displacement
• Double-shot measurement
• Optical coherence tomography

A dual-channel phase-contrast spectral optical coherence tomography (DPC-SOCT) method is proposed for measuring axial and normal to B-scan off-axial displacements inside weakly scattering translucent materials. By employing a dual-channel observation structure with depth multiplexing, only one shot before and one shot after the object deformation are required for simultaneously measuring the displacements. To validate the method, a DPC-SOCT system was built and axial and normal to B-scan off-axial displacements inside polymer films were measured at 20 frames per second. The results suggest that the method can be used for investigating inner mechanical properties of materials under different loads. In the future, a method for all orthogonal measurement of displacement components will be developed.

• 出版日期2017-9
• 单位武汉大学; 广东工业大学