A Decentering Inspection System on Optical Lens by Image Processing

摘要

In recent years, according to the growing demand for mobile phone terminal market and smart phone shipments, the global demand of mobile phone camera modules are increased. Based on the lightweight, compact and high precision of the optical system, the errors of the processing and assembly for the optical components have great influences on the optical system, especially for the imaging lens of mobile phone camera module. For such axial symmetry of optical components in the production or systems assembly, if the principal axis has coincidence error with the rotation axis of symmetry, the decentration error will be occurred. In the past, the traditional inspection by using the transmission or reflection measurements is limited to the geometry and size of the lens, so that the inspection is incapable of being effectively speeded up. Accordingly, this study developed a new imaging lens of optical lens decentering inspection system by the fast, accurate and low-cost detection, to achieve a large number of batch inspections for the decentration error.