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  Our resolution is the wavelength of light  

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Non-destructive testing is the common use of shearography. The defects become visible on measuring their inhomogeneous deformation gradients. Depending on the spatial distribution of deformation the defect or the structure itself can be characterised. The rotor measurements show a dis-bond (left), a crack (right) and a structural transition (centre). Compare fringe density and distribution.

 

The high sensitivity of shearography calls for small loads. Commonly-used loading principles are 
  - variation of pressure for tubes and tanks, 
  - vacuum chambers and heat applied by flash lights and 
  - dynamic excitation, which  is a special technique developed by isi-sys

For more information about isi-sys products and itīs applications contact us or check our internet pages e. g. for  further application examples or products:
 

     NDT by vacuum chambers and heat.

     NDT by  dynamic excitation for disbonds in C-SI-C heatshild.

     NDT by dynamic excitation applied on GLARE (Airbus 380)

     NDT by dynamic excitation use for impact defect detection in CFRP