OPTICAL INFORMATION READING DEVICE

PROBLEM TO BE SOLVED: To provide an optical information reading device that can reduce an installation load on a user and can accurately read codes provided to various workpieces.SOLUTION: A polarized illumination light source includes light emitters 26, 27 that irradiate a workpiece with illumination light through a polarization filter 91. A non-polarized illumination light source includes light emitters 28, 29 that irradiate the workpiece with illumination light not through a polarization filter. An imaging element 31 is provided with a polarization filter 92 having a polarization direction different from a polarization direction of the polarization filter 91 of the light emitters 26, 27. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.SELECTED DRAWING: Figure 7 【課題】ユーザの設置負担を軽減でき、かつ、様々なワークに付与されたコードを精度よく読み取り可能な光学的情報読取装置を提供すること。【解決手段】偏光照明光源は偏光フィルタ９１を介して照明光をワークに照射する発光素子２６、２７を備えている。無偏光照明光源は偏光フィルタを介さずに照明光をワークに照射する発光素子２８、２９を備えている。撮像素子３１には、発光素子２６、２７の偏光フィルタ９１の偏光方向とは異なる偏光方向の偏光フィルタ９２が設けられている。ワークに応じて偏光照明光源と無偏光照明光源のいずれかが使用される。【選択図】図７