Hao Zhu, Li Xu, Mingyao He, Yanhua Fu, Ruixian Li, Qinglan Wang. Measurement of Steel Ball Diameter and Roundness Error Based on Fresnel Diffraction[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0126003
- Laser & Optoelectronics Progress
- Vol. 59, Issue 1, 0126003 (2022)
Fig. 1. Projected image of spherical Fresnel diffraction
Fig. 2. Schematic diagram of spherical diffraction fringe spacing
Fig. 3. Schematic photogaraph of experimental facility
Fig. 4. Diffraction diagram of dot. (a) Diffraction of calibration board dot; (b) Butterworth filter image
Fig. 5. Central point location of diffraction image. (a) 3D view of the accumulation array; (b) center position marked
Fig. 6. Edge location of 4 mm diameter dot diffraction
Fig. 7. Calibration curve of offset
Fig. 8. Diffraction image of steel ball
Fig. 9. Diameter measurements of steel balls with different diameters in different light intensity direction .(a) d=2 mm; (b) d=2.5 mm; (c) d=3 mm; (d) d=3.5 mm; (e) d=4 mm
Fig. 10. Least square circle method
Fig. 11. Least squares circles and envelope silhouette of 4 mm diameter steel ball
Fig. 12. Envelope silhouette of different diameters steel balls
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Table 1. Mean values and standard deviation of the steel balls with different diameters
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Table 2. Results of roundness measurement
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Table 3. Uncertainty of measurement
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