Back to Search Start Over

Panoramic dual-directional shearography assisted by a bi-mirror

Authors :
Meiling Dai
Xiangjun Dai
Hanyang Jiang
Fujun Yang
Xiaoyuan He
Yinhang Ma
Source :
Applied Optics. 59:5812
Publication Year :
2020
Publisher :
Optica Publishing Group, 2020.

Abstract

A panoramic dual-directional shearography system is proposed to simultaneously determine out-of-plane deformation derivatives in two directions and globally inspect the object to be tested. A dichroic filter (DF), a 3CCD camera, and dual-wavelength light are used in the proposed shearography configuration. The dual-wavelength light coupled with the corresponding imaging sensors of the 3CCD camera provides independent color signals and shearograms. Through adjustment of the tilted stereo-angle of the DF, which offers a second wavelength-dependent measurement, an additional independent image-shearing can be introduced into the setup. The auxiliary bi-mirror surrounding the object helps to fully illuminate the object surface and capture it in a single shot. Theoretical analysis and experimental results demonstrated the utility of the system.

Details

ISSN :
21553165 and 1559128X
Volume :
59
Database :
OpenAIRE
Journal :
Applied Optics
Accession number :
edsair.doi.dedup.....66b567e90d6b1f5efdd6f830b8a6fb9b
Full Text :
https://doi.org/10.1364/ao.394218