Method and system for measuring sizes of pattern of lens

Abstract

A method and system for measuring sizes of a pattern of a lens are provided. The method include: using a printing module to form a lens including a pattern; using a camera module to capture a lens image of the lens including the pattern, wherein the lens image includes a pattern image portion corresponding to the pattern; providing an annular mask unit on the lens image, wherein the annular mask unit covers the pattern image portion; using an image analysis unit to perform at least one of step (a) and step (b): (a) determining an inner circle on the pattern image portion and calculating a diameter of the inner circle, (b) determining an outer circle of the pattern image portion and calculating a diameter of the outer circle, wherein the image analysis unit is coupled to the camera module. The most illustrative figure is Fig 2.