Code reader
AssigneeSick AG
InventorWolfram Runge
Life of this patent
Estimating the term…
Abstract
A scanner, especially one for the detection of one- and/or two-dimensional codes with a reception optics, projects the image of a reading line onto a linear arrangement of photoreceivers. An illumination arrangement for linearly illuminating an entire reading line has several substantially point-like light sources arranged adjacent to each other in a line. To boost the efficiency of the illumination arrangement, it has at least one anamorphotic illumination optics which forms the light emitted by the light sources into an illumination line.
Claims10
A scanner for detecting one-and/or two-dimensional codes comprising a reception optics that directs an image of a reading line onto a line-shaped arrangement of a plurality of photoreceivers, and an illumination arrangement for linearly illuminating the reading line including a plurality of substantially point-like light sources arranged adjacent to each other along a line and at least one anamorphotic illumination optics which transforms light emitted by the light sources into an illumination line, the anamorphotic illumination optics comprising an at least two-stage projection system having a short focal length toroidal convex lens in a vicinity of each light source forming a light beam in a meridional plane, and a common long focal length refractive cylindrical lens acting in a sagittal plane.
Dependencies are inferred from the claim text.