Provided is an optical information reading device that can reduce an installation load on a user, and can accurately read a code provided to each of various workpieces. A polarized illumination light source includes light emitters that irradiate the workpiece with illumination light through a polarization filter. A non-polarized illumination light source includes light emitters that irradiate the workpiece with illumination light without through a polarization filter. An imaging element is provided with a polarization filter having a polarization direction different from a polarization direction of the polarization filter of the light emitters. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.

Provided is an optical information reading device that can reduce an installation load on a user, and can accurately read a code provided to each of various workpieces. A polarized illumination light source includes light emitters that irradiate the workpiece with illumination light through a polarization filter. A non-polarized illumination light source includes light emitters that irradiate the workpiece with illumination light without through a polarization filter. An imaging element is provided with a polarization filter having a polarization direction different from a polarization direction of the polarization filter of the light emitters. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.

A protective cap for a scanning device is provided that retains a device exit window in a fixed position relative to a scan engine while reducing the likelihood of a collision between the scan engine and the exit window when the scanning device is subjected to mechanical stress. Also provided are scanning devices having such a protective cap. The protective cap includes first, second and third portions. The first portion is coupled with an outwardly-facing surface of the exit window and operates to retain the exit window against a scan engine support. The second portion is coupled with the scan engine support and operates to keep the scan engine at a fixed distance from the exit window. The third portion is coupled with an enclosure for the scanning device and operates to secure the exit window and the scan engine at a fixed position with respect to the enclosure.

A protective cap for a scanning device is provided that retains a device exit window in a fixed position relative to a scan engine while reducing the likelihood of a collision between the scan engine and the exit window when the scanning device is subjected to mechanical stress. Also provided are scanning devices having such a protective cap. The protective cap includes first, second and third portions. The first portion is coupled with an outwardly-facing surface of the exit window and operates to retain the exit window against a scan engine support. The second portion is coupled with the scan engine support and operates to keep the scan engine at a fixed distance from the exit window. The third portion is coupled with an enclosure for the scanning device and operates to secure the exit window and the scan engine at a fixed position with respect to the enclosure.

Provided is an optical information reading device that can reduce an installation load on a user, and can accurately read a code provided to each of various workpieces. A polarized illumination light source includes light emitters that irradiate the workpiece with illumination light through a polarization filter. A non-polarized illumination light source includes light emitters that irradiate the workpiece with illumination light without through a polarization filter. An imaging element is provided with a polarization filter having a polarization direction different from a polarization direction of the polarization filter of the light emitters. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.

Provided is an optical information reading device that can reduce an installation load on a user, and can accurately read a code provided to each of various workpieces. A polarized illumination light source includes light emitters that irradiate the workpiece with illumination light through a polarization filter. A non-polarized illumination light source includes light emitters that irradiate the workpiece with illumination light without through a polarization filter. An imaging element is provided with a polarization filter having a polarization direction different from a polarization direction of the polarization filter of the light emitters. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.