Real-time Measurement Technology of Digital Speckle Deformation Based on Fourier Transform

This paper proposes a real-time measurement technology of digital speckle deformation based on Fourier transform by slightly improving the existing out-of-plane deformation measurement technology of planar objects. The speckle image collected by the CCD is subjected to carrier elimination, inverse Fourier transform and other methods to obtain the speckle interference fringes with low noise and high contrast. The experimental results of the out-of-plane deformation measurement of the aluminum plate show that the technology can measure the real-time deformation of the tested piece.