Dong’e Zhao, Siyu Wang, Yayun Ma, Bin Zhang, Nuolun Li, Yuan Li, Wenbo Chu. Measurement of micro-displacement based on the interference of vortex beams and spherical wave[J]. Infrared and Laser Engineering, 2020, 49(4): 0413005
- Infrared and Laser Engineering
- Vol. 49, Issue 4, 0413005 (2020)
Fig. 1. Simulation flow chart of measuring micro-displacement based on the theory of vortex beams and spherical wave interference
Fig. 2. Interference intensity of vortex beams and spherical wave before and after micro-displacement in the simulation
Fig. 3. Subtractive intensity distribution of the interferogram before and after the micro-displacement of the object in the simulation
Fig. 4. Tangent line of the spiral fringe before and after micro-displacement of object in the simulation
Fig. 5. Experimental set up for measuring micro-displacement of objects based on vortex beams and spherical wave interferometry
Fig. 6. Interference fringes of vortex and spherical waves in the experiment. (a) Interference pattern before the displacement of the piezoelectric ceramics , (b) Interference pattern after the displacement of the piezoelectric ceramics
Fig. 7. MATLAB processing results of experimental image. (a) Subtractive intensity distribution of the interferogram before and after the micro-displacement, (b) Tangent of the spiral fringe before the micro-displacement, (c) Tangent of the spiral fringe after the micro-displacement
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Table 1. Measurement results of simulation
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