Nondestructive inspection of tissue/tissue like phantom curved surfaces using digital speckle shearography

Sujatha, N.; Murukeshan, Vadakke Matham

doi:10.1117/1.1810531

Cited by 21 publications

(5 citation statements)

References 13 publications

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“…Figure 30 shows an out-of-plane displacement derivative measurement of a MEMS pressure sensor with dimensions of 1.5 mm 2 . Shearography displacement derivative measurements have also been applied to the analysis of tissue phantoms [125]. A comparison of normal specimens with those containing abnormalities showed encouraging results with non-destructive evaluation of living biological samples the subject of future research.…”

Section: Small-scale Measurementsmentioning

confidence: 99%

Shearography technology and applications: a review

Francis

Tatam

Groves

2010

Meas. Sci. Technol.

221

126

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Shearography is a full-field speckle interferometric technique used to determine surface displacement derivatives. For an interferometric technique, shearography is particularly resilient to environmental disturbances and has hence become an invaluable measurement tool outside of the optics laboratory. Furthermore, the inclusion of additional measurement channels has turned shearography from a qualitative inspection tool into a system suitable for quantitative surface strain measurement. In this review article we present a comprehensive overview of the technique, describing the principle of operation, optical configurations, image processing algorithms and applications, with a focus on more recent technological advances.

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Section: Small-scale Measurementsmentioning

confidence: 99%

Shearography technology and applications: a review

Francis

Tatam

Groves

2010

Meas. Sci. Technol.

221

126

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“…The need for the precise surface strain mapping onto real curved objects is supported by numerous applications of shearography in aerospace [2,3,18], e.g., airplane and automotive tires inspection [2,25], inspection of inner cylindrical surfaces using endoscopic shearography with radial sensitivity [26], or inspection of soft tissue phantoms [27].…”

Section: Introductionmentioning

confidence: 99%

3D shape shearography technique for surface strain measurement of free-form objects

2019

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Shearography is a non-destructive testing technique that provides full-field surface strain characterization. Previous inspection of flat objects or simple geometric shapes has been reported. However, real-life objects especially in aerospace, transport, or cultural heritage are not flat, but their inspection with shearography is of interest for both hidden defect detection and material characterization. Accurate strain measurement of a highly curved or free-form surface needs to be performed by combining in-line object shape measuring and processing of the shearography data in 3D. Previous research has not provided a general solution for that. This paper presents a new approach of 3D shape shearography which is based on the integration of a structured light projector for in-line shape measuring with 3D shearography. For the experimental part, a 3D shape shearography system prototype was developed and its performance was evaluated with a cylinder specimen loaded by internal pressure and compared with strain gauges.

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“…6 However, when the endoscope was set in the shear configuration, the imaged area falls under the central region of the butterfly fringe pattern, due to the smaller interrogation ͑imaged͒ area. The shear fringe pattern obtained at the abnormality site for the abnormal colon phantom ͑cancer growth size 3 mm͒ using the fiberscope is shown in Fig.…”

mentioning

confidence: 99%