DefectAIM series lens defect measuring instrument is developed for the defects detection of the optical reflective surface. The DefectAIM is based on the digital imaging technology and our own recognition algorithm, so that it can implement the lens surface defect (scratches, dots and dust) detection. The equipment has the characteristics of fast, accurate, quantitative and efficient, greatly improves the existing visual acuity testing methods relying on experienced technicians. Customers can choose their own result standard, then the system will give out quantitative test results and all the defects can be directly observed.