Shearographic Imaging System.

The purpose of the present work is to develop an on-line optical image shearing method together with and electronic camera and storage system to study surface deformation, voids, cracks and other flaws in material media in a nondestructive manner. It is intended that the initial work is to be divided into two parts. The first part of this investigation is to set up an all optical system in which and object under observation is illuminated normally by a coherent source of light Helium Neon Laser and is imaged with an image shearing technique in which a small angle prism approx. 1 degree covering only one half of a lens system. The second part of the initial work is to replace the optical camera with and electronic imaging system with relevant hard and software to provide an on-line study of strain gradients in materials under stress.