Relay lens and lens module detection device and detection method

The invention discloses a relay lens and a lens module detection device and detection method, the relay lens at least comprises a first lens and a second lens which are arranged in sequence, and the first lens and the second lens are combined into a convex lens group which is provided with a positive focal distance. The lens module detection device includes the relay lens and a resolution plate which is used for imaging analysis, wherein the second lens of the relay lens faces the resolution plate, and the resolution plate is oppositely arranged out of a distance twice the focal distance of the relay lens. During the detection, the lens module to be detected is placed on the side close to the first lens of the relay lens and is placed within the distance twice the focal distance of the relay lens, and the lens module can subject a virtual image of the resolution plate, which is produced through the relay lens, to imaging. Therefore, the quality of the lens module can be judged through the imaging quality of t