Shearography

Shearography is extensively used in production and development in aerospace,[2] wind rotor blades, automotive, and materials research areas.

When a surface area is illuminated with a highly coherent laser light, a stochastical interference pattern is created.

This contains a stepping mirror that shifts the reference beam, which is then processed with a best fit-algorithm and presents the information in real time.

The main applications are in composite nondestructive testing, where typical flaws are: Disbonds, Delaminations, Wrinkles, Porosity, Foreign objects, and Impact damages.

Industries where Shearography is used are: Aerospace, Space, Boats, Wind power, Automotive, Tires, and Art conservation.

A vacuum shearography hood and data display unit is applied to a composite structure to check for defects. An indication of a possible defect appears as the ripple pattern on the bottom right of the data screen.