| 摘要 |
A tri-optic scanner for checking out merchandise at stores includes first and second barcode scanners, and a third barcode scanner placed back-to-back to the second barcode scanner to face an opposite direction of the second barcode scanner. The tri-optic scanner is designed to allow the third barcode scanner to conveniently capture barcodes presented by a customer without a cashier touching barcode carriers that belong to the customer.
|
