Shunqin Xu, Lihong Yang, Qinyue Fu, Qianxi Chen, Xingyuan Li, Hang Ge. Visual Detection Method of Optical Lens Surface Defect Under Dual Light Sources[J]. Laser & Optoelectronics Progress, 2024, 61(10): 1012004
- Laser & Optoelectronics Progress
- Vol. 61, Issue 10, 1012004 (2024)
Fig. 1. Structure of the critical defect detection device
Fig. 2. Images acquired from the lenses under different illumination. (a) Surface image collected under forward light; (b) surface image collected under backlight
Fig. 3. Telecentric lens imaging features
Fig. 4. Two light source illumination modes. (a) Ring-light source illumination mode; (b) parallel backlight source illumination mode
Fig. 5. Flow chart of image processing
Fig. 6. Images acquired from optical lenses under different light sources. (a) Forward light defect image; (b) backlight defect image
Fig. 7. Preprocessed defect images. (a) Defects identified in forward light; (b) defects identified in backlight; (c) defects identified after image fusion
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Table 1. Calibration parameters
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Table 2. Error analysis
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Table 3. Lens defect detection results
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Table 4. Comparison among system detection results, ZYGO detection results and manual detection results
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