Equipment and method for detecting appearance of cambered-surface lens product

According to the cambered surface lens product appearance detection equipment and detection method provided by the invention, the Z-axis module is controlled to move by a fixed distance through a motion program, the camera is driven to shoot from top to bottom, and the effective range of shooting each time is the depth of field of one lens, so that layered shooting of irregular products such as cambered surfaces or spherical surfaces is met; different layer images correspond to the height positions of the defects; a surface light source is divided into different areas through program control, the on-off state and brightness display of each section of area can be controlled through a program, two images are shot by reversing the on-off state and the off-on state of different areas, the defect of a product can be completely presented through the two groups of reversed images, and the two groups of images are synthesized into one detection image. The synthesized detection image can retain defect features, and me