Fig. 1. Schematic diagram of the same object imaging separately in the camera array

Fig. 2. Three simulated objects with different object distances

Fig. 3. 5×5 camera array simulation imaging

Fig. 4. Digital refocusing results of surface defects of optical elements at different object distances

Fig. 5. Schematic diagram of defect detection results of optical components

Fig. 6. Schematic diagram of optical components defect detection based on camera array

Fig. 7. Digital refocusing results of the three targets

Fig. 8. Schematic diagram of length and width comparison of defects’ external rectangle under digital refocusing and off-line detection methods