Testing requirements

Mobile phone GAP GAP size and small defect.

The difficulty of the Project

Ordinary lens, because of the distortion can't control deformation problem, the four corners of the image, image four corners because no regular distortion makes unable to realize high precision measurement.Because mobile phone GAP testing is focused on solving the corners of mobile location size measurement, so the general did not use in camera.

The solution

Use BT series double telecentric lens.

Application advantages

Low distortion, distortion, generally less than 0.1%, for 1/20 of the normal lens.

High resolution, even with small pixel image sensor can also generate high resolution images, CFT is (The contrast transfer function) 70 lp/mm > 30%.

Application development

For a one-time corners or defect size detection object, avoid to use four sets of optical system to solve the corners of the general optical system aberration problems, as long as the test objects within the camera view, use double telecentric lens can realize one-time mining graph is solved.

Author：BTOS Editor