The Talbot effect of the finite phase grating is theoretically, computationally and experimentally investigated. The diffraction of finite periodic phase arrays in the Fresnel region is analyzed according to the scalar diffraction theory. The simulations can be performed with any PC using a MATLAB ...
talbot effectmoire fringeA method for measuring focal length based on Talbot effect is put forward, which suits determining focal length of long-focus lens. The variation of Moire fringes occurs after typical phase object of measuring lens is laid between two gratings. The images of fringes taken...
As an example, we numerically evaluate the intensity distribution of the diamond array in triangular symmetry in the fractional Talbot plane using Matlab, The result is a good agreement with the theory.Weijuan QuLiren LiuDe'an LiuZu Luan
long focal lengthcalibrationA complete set of ultra-long focal length measurement system based on the principle of Talbot effect and moire fringe technology has been developed. The numerical simulation is coded taking advantage of matlab. The errors deduced by errors of parameters of ultra-long ...
The Talbot effect [1], a superposition phenomenon of multi-slit interference and single-slit diffraction, was interpreted by L.Rayleigh according to the Fresnel diffraction theory [2]. When a plane wave illuminates a periodic structure, imitative images of structure should appear at a periodic dist...