Creating a spiral hole screen to generate first-order phase vortices
Based on the theory of diffraction and interference of light,Matlab program was used to numerically calculate the optical field intensity and phase vortex distribution of spiral hole screens whose hole numbers ranges from one to six.Spiral hole screens with 1～6 holes were handmade.Mach-Zehnder interference optical path was constructed.The interference intensity between the light field generated by each spiral hole screen and the reference light was experimentally obtained.The ex-perimental results were almost identical to the numerical calculation results.
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