| 摘要 |
A device including an optical reader, a first light source, and a second light source. The optical reader has a field of view comprising a first surface point and a second surface point horizontally offset from the first surface point along the field of view. The first light source is positioned a first distance from the first surface point. The first light source is operably connected to a first control channel and has a first luminous output. The second light source is positioned a second distance from the second surface point and has a second luminous output. The first distance is different from the second distance, and the first luminous output is different from the second luminous output such that the illumination at the first surface point is substantially equivalent to the illumination at the second surface point of the field of view. |
