Digital shearography for NDT: phase measurement technique and recent developments

Q Zhao, X Dan, F Sun, Y Wang, S Wu, L Yang - Applied Sciences, 2018 - mdpi.com
Composite materials have seen widespread use in the aerospace industry and are
becoming increasingly popular in the automotive industry due to their high strength and low …

[HTML][HTML] Shearography and its applications–a chronological review

R Sirohi - Light: Advanced Manufacturing, 2022 - light-am.com
This paper presents the activities in the field of shearography in chronological order and
highlights the great potential of this holographic measurement technology. After a brief …

A simultaneous multi-directional defects measurement based on polarization-multiplexed four-directional digital shearography with large field of view

L Yan, L Tan, L Huang, B Chen - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Since the sensitivity of digital shearography (DS) is related to its shearing direction and the
anomaly of the relative deformation is sensitive to the defect direction in non-destructive …

Dual-directional shearography based on a modified common-path configuration using spatial phase shift

S Wang, J Dong, F Pöller, X Dong, M Lu, LM Bilgeri… - Applied Optics, 2019 - opg.optica.org
This paper describes a dual-directional shearography system to address the issue of two-
dimensional characterization of the surface strain. A common-path configuration coupled …

Sagnac interferometer based digital shearography for simultaneous dual sensitivity measurement

B Zhang, X Zheng, B Guo, S Fang, B Sia… - Optics and Lasers in …, 2022 - Elsevier
This paper presents a single camera digital shearography system with dual sensitivity to
enable simultaneous measurement of minor and large shearograms in a single field …

Spatial phase-shift digital shearography for simultaneous measurements in three shearing directions based on adjustable aperture multiplexing

P Yan, F Sun, X Dan, Q Zhao, Y Wang… - Optical …, 2019 - spiedigitallibrary.org
Because the sensitivity of shearography is determined by its shearing direction, aeolotropic
defects could be difficult to detect in nondestructive testing (NDT) using a digital …

Review of shearography for dual-directional measurement

B Guo, B Zhang, X Zheng, S Fang, Y Fang, B Sia… - Optics, 2022 - mdpi.com
Shearography is a coherent optical technique that allows the identification of the first
derivative of deformation in the shearing direction. Due to direct measuring strain …

[HTML][HTML] Extreme shearography: Development of a high-speed shearography instrument for quantitative surface strain measurements during an impact event

AG Anisimov, RM Groves - Optics and Lasers in Engineering, 2021 - Elsevier
Monitoring of extreme dynamic loadings on composite materials with high temporal and
spatial resolution provides an important insight into the understanding of the material …

[HTML][HTML] A robust phase extraction method for overcoming spectrum overlapping in shearography

X Liu, P Yan, Y Wang - Light: Advanced Manufacturing, 2023 - light-am.com
The advantage of spatial phase-shifting shearography is its ability to extract the phase from
a single speckle pattern; however, it often faces spectrum overlapping, which seriously …

[PDF][PDF] 基于LC-SLM 的空间载波相移剪切散斑干涉

王永红, 谢昊天, 孙方圆, 刘向玮, 吴双乐… - Acta Optica …, 2021 - researching.cn
摘要针对传统空间载波相移剪切散斑干涉系统中剪切量难以快速, 定量, 精确调节的问题,
提出了一种利用液晶空间光调制器(LC-SLM) 调制剪切量的空间载波相移剪切散斑干涉测量系统 …