Imaging reader with improved illumination

摘要

A data reading system, such as for reading optical codes being passed through a read zone, including one or more imagers, and at least one illumination module, all disposed in a reader housing, the illumination module in one configuration having a reflector housing comprised of a cone-shaped structure of generally rectangular cross-section, with a top inner surface and a bottom inner surface, wherein area of the cross-section of the cone-shaped structure increasing from a rear end to a front end, and an illumination source (such as a plurality of light emitting diodes) disposed at the rear end of the reflector housing and operative to generate illumination out through the reflector housing along an outgoing illumination path, the top inner surface of the reflector housing being a surface of high reflectivity relative to the bottom inner surface of the reflector housing which has a surface of relatively low reflectivity. Also disclosed are imager configurations for providing multiple fields of views of multiple imagers co-mounted on a common PCB.

主权项

1. A data reader comprising:
a reader housing constructed and arranged for installation at a checkstand, the reader housing having a window; an illumination module disposed in the reader housing, the illumination module comprising
a reflector housing comprised of a pyramid-shaped structure of generally rectangular cross-section, with a top inner surface and a bottom inner surface, wherein the pyramid-shaped structure has an increasing cross-sectional area from a rear end to a front end,a light source disposed at the rear end of the reflector housing and operative to generate illumination out through the reflector housing along an outgoing illumination path,wherein the top inner surface of the reflector housing comprises a surface of high reflectivity relative to the bottom inner surface of the reflector housing that comprises a surface of low reflectivity.