| 摘要 |
A barcode scanner includes a laser for projecting a laser beam in an outbound path at a barcode, and effecting back scattered light therefrom in an opposite inbound path. A focusing lens is optically aligned with the laser in both the outbound and inbound paths, and has an optical axis laterally offset from the laser. A detector is laterally offset from the laser and optically aligned with the lens for receiving the scattered light therefrom.
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