Patent ID: 8009281

Claim:
A lens module distortion measuring system, comprising: a light source configured to emit light rays; a diffusing panel beneath the light source and configured to diffuse the light rays; a substantially opaque shielding plate beneath the diffusing panel, the shielding plate defining a regular matrix of light-passing holes; an image capturing device configured to capture an image of the shielding plate as viewed through the lens module, the image comprising an array of light spots corresponding to the light-passing holes; and a computing unit electrically connected to the image capturing device and configured to analyze the light spots of the image and thereby determine the distortion of the lens module, wherein the computing unit calculates a first average distance between adjacent light spots in a central portion of the image, and a second average distance between adjacent light spots in a peripheral portion of the image, and the distortion of the lens module is the ratio of the second average distance to the first average distance.