Li Qihui, Ding Yalin, Xiu Jihong, Liu Chongyang, Cai Yiming, Liao Jinfeng. Self-Collimation Inspection and Focusing Method Based on Image Processing[J]. Laser & Optoelectronics Progress, 2020, 57(2): 21104
- Laser & Optoelectronics Progress
- Vol. 57, Issue 2, 21104 (2020)
Fig. 1. Schematic of ideal imaging system
Fig. 2. Relationship between light intensity and defocusing distance
Fig. 3. Schematic of image auto-collimation inspection and focusing system
Fig. 4. Schematics of targets. (a) Grating target; (b) radial target
Fig. 5. Defocus diagrams of radial and grating targets. (a) 26th image; (b) 38th image; (c) 51st image
Fig. 6. Normalized eigenvalue curves of the defocus image. (a) Lena; (b) grating; (c) radiation; (d) contrast of three targets
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Table 1. Comparative analysis of inspection and focusing results
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