Shearography or Speckle pattern shearing interferometry is a measuring and testing method similar to holographic interferometry. It uses coherent light or coherent soundwaves [1] to provide information about the quality of different materials in nondestructive testing, strain measurement, and vibration analysis.

Shearography, also known as speckle pattern shearing interferometry, is a method for measuring and detecting a range of different defects on metallic and composite materials.

Shearography is an optical method which uses speckle shearing interferometry to measure displacement gradients at the surface of a structure. The speckle patterns produced with the component in stressed and unstressed states are subtracted and the differences reveal changes in displacement gradient.

Shearography is an optical Non Destructive Testing (NDT) method that provides information on the surface of materials. The Technique is non-contact and full-field with the main applications related to Quality Inspection of composites and other materials.

Nov 30, 2023 · Shearography is an advanced optical technology used to detect tiny deformations and defects on the surface of objects. It is based on the principle of interference and detects possible structural defects by observing the slight displacement of objects under loading stress or environmental changes.

Jan 14, 2022 · After a brief introduction, the basic theory of shearography is presented. Shear devices, phase-shift arrangements, and multiplexed shearography systems are described. Finally, the application areas where shearography has been accepted and successfully used as …

Shearography, also known as speckle pattern shearing interferometry, is an optical NDT technique that employs laser interferometry to detect internal defects and structural issues within tires.

Jul 13, 2019 · Shearography, sometimes called speckle pattern shearing interferometry, is a laser-based optical interferometric method that is similar to ESPI. Unlike ESPI, which measures deformation, shearography directly measures the gradient of the deformation, e.g., strain information, using a special shearing device.

Apr 21, 2005 · Shearography is a laser-based technique for full-field, non-contacting measurement of surface deformation (displacement or strain). It was developed to overcome several limitations of holography by eliminating the reference beam.

DEKRA performs shearography as advanced optical non-destructive testing method to detect defects in laminar structures, such as polymer composites, sandwich structures and other bonded structures.