Lens for scanners

摘要

The specification discloses a lens for scanners. At the same time of shortening the optical paths among devices in the scanning module of the scanner, the size of the lens increases within a limited range so that the scanner still has a compact dimension. The lens has a cylindrical shape. The rims of the two opposite end surfaces are comprised of two opposite lines and two opposite arcs. The centers of the arcs are located at correspondingly the same positions on the end surfaces. Therefore, the beam can enter one end surface and leave from the other.