Patent ID: 6219143
Filing Date: 2001-04-17
Classification: G01B

Abstract:
An apparatus for performing electronic shearography on a test object comprising:a source of coherent electromagnetic radiation for illuminating the test object;an optical element through which electromagnetic radiation reflected from the test object is transmitted forming an interference image;a detector, the detector converting the interference image into an electrical signal representative of the interference image;an animation device coupled to the detector, the animation device receiving the electrical signal representative of the interference image, the animation device retaining image information derived from the electrical signals representative of the interference image at a predetermined frame rate, the animation device comparing the retained interference image information with a baseline interference image to produce a shearogram image, and the animation device adapted to play a series of sequential shearogram images, providing an animation representative of dynamically changing stress states on the test object; anda display device coupled to the animation device, providing visualization of the animation,wherein a user of the apparatus may play back at least one animation after the animation is created.