Editing Barcode reader (section)

==== CCD readers (also known as LED scanners) ====
[[File:CCD-Barcode-Scanner.jpg|thumb|CCD Barcode Scanner]]
[[Charge-coupled device]] (CCD) readers use an array of hundreds of tiny light sensors lined up in a row in the head of the reader. Each sensor measures the intensity of the light immediately in front of it. Each individual light sensor in the [[CCD reader]] is extremely small, and because there are hundreds of sensors lined up in a row, a voltage pattern identical to the pattern in a barcode is generated in the reader by sequentially measuring the voltages across each sensor in the row. The important difference between a CCD reader and a pen or laser scanner is that the CCD reader is measuring emitted ambient light from the barcode, whereas pen or laser scanners are measuring reflected light of a specific frequency originating from the scanner itself. LED scanners can also be made using CMOS sensors, and are replacing earlier Laser-based readers.<ref>{{Cite web|url=https://support.honeywellaidc.com/s/article/Considerations-when-Introducing-LED-illumination-in-to-the-area-where-barcodes-are-being-scanned|title=Considerations when introducing LED illumination in to the area where barcodes are being scanned?|date=September 25, 2019|website=support.honeywellaidc.com|access-date=January 4, 2020|archive-date=January 11, 2020|archive-url=https://web.archive.org/web/20200111161048/https://support.honeywellaidc.com/s/article/Considerations-when-Introducing-LED-illumination-in-to-the-area-where-barcodes-are-being-scanned|url-status=dead}}</ref>{{better source needed|date=January 2019}}