| 主权项 |
1. A data reading system for reading data on an item, the data reading system comprising:
a main housing including a lower housing section containing a horizontal surface with a horizontal window and an upper housing section containing a vertical window, the horizontal surface of the lower housing section including a reference marking; a height-adjustable top-down data reader for capturing data from an item in a read zone, the top-down data reader having a downwardly-facing field of view projecting through a scan window and onto the read zone, the top-down data reader positioned at a height higher than a corresponding height of the upper housing section of the main housing; and a calibration system in communication with the top-down data reader, wherein the calibration system detects the reference marking on the horizontal surface and, in response to detecting the reference marking, generates a feedback signal indicating whether the field of view of the top-down data reader at an adjusted height position is targeting the read zone, the calibration system further comprising:
a reference label bearing a calibration optical code, wherein after aligning a first end of the reference label with the reference marking on the horizontal surface, the calibration system processes the calibration optical code and generates a second feedback signal indicating whether the field of view of the top-down data reader is in focus. |
