As the resolution of camera modules for mobile phones becomes higher and higher, the actual distance of the module becomes very long during the module focus test. The production line will face great difficulties in building a test environment. Dehong relay mirror is used to solve this problem, shorten the test distance, and control the degree of surface and distortion within the minimum range. --Industrial lens

Keywords: telecentric lens, industrial lens, camera lens, coaxial light lens, industrial light source