Multifunction tridimension displacement laser interference measuring system

The measuring system is composed of laser, image collection camera system, spectrum coupler, 3D interference optical system, and 6D adjustable loading frame. The measuring system provides functions of real time measurement in u, v, w three displacement fields with high accuracy in sensitivity of wavelength magnitude, possessing two measuring modes: gradation interference and electronic speckle interference. Adjustment in six degrees of freedom is realized by 6D adjustable loading frame so as to implement loading experiments of one-way pulling and pressing, and bending at three points providing features of easy of use, compact structure and high precision. Moreover, there is phase shift system. Measuring precision reaches to nano magnitude when phase shift technique is applied.