Camera Hole Inner Wall Pad Printing is a key area in camera modules used to mark models, parameters, or positioning. It features specific characters, patterns, or marks formed on the inner wall of the camera hole through pad printing technology, commonly found in lens modules of devices such as mobile phones and security cameras. Its core composition includes the camera hole substrate (mostly metal or plastic) and the pad - printed ink layer on the inner wall.
Inspection faces multiple challenges: the inner wall of the camera hole is curved with narrow space, and uneven light irradiation easily creates shadows, resulting in blurred imaging; pad - printed characters are tiny and may have defects like incompleteness, missing prints, or ink accumulation, making manual visual inspection prone to missed detections due to view - angle limitations; traditional vision equipment struggles to adapt to curved surface inspection scenarios and has insufficient recognition accuracy for low - contrast defects, seriously affecting inspection stability and efficiency.
