The periscope lens of a mobile phone is a core component that enhances the zoom capability of mobile phone photography. It enables high-definition imaging at long distances through a periscope structural design and is widely used in mid-to-high-end smartphones. It mainly consists of precision parts such as glass lenses with coatings and silk-screen printing, lens barrels, and drive motors, where the optical performance of the lenses directly affects imaging quality.
Its cosmetic inspection faces multiple challenges: the glass material is transparent and small in size, with subtle defect features such as chipping, dots, and ghosting, making manual visual inspection prone to missed detections and extremely inefficient; traditional automated equipment has insufficient algorithm accuracy, struggling to distinguish between real and false defects, resulting in high over-inspection and missed detection rates; the optical properties of the coating and silk-screen layers also cause imaging interference, further increasing the difficulty of stable inspection and severely restricting production line yield and capacity.
