Different working principles of red bar code scanner and laser bar code scanner
Then, this is the identification bar code principle of the laser barcode scanner: Guangxi U-Yee Environmental Technology Co.,Ltd , https://www.biodegradetableware.com
Bar code scanner red light and laser are different, why is there a gap in price? Today, I will analyze one point for you: the different working principle of the red bar code scanner and the laser bar code scanner!
First of all, this is the identification barcode principle of the red light scanner: 
In the camera, a bar code image on the red image sensor is captured through the lens based on the red bar code scanner. Therefore, if the captured image is out of focus or the barcode is blurred, it is difficult to read the barcode. 
The spot diameter is the smallest in focus. At a position larger or smaller than the focal length, the spot diameter becomes large, so that the barcode/space area cannot be recognized. The resolution is highest at the focal length position. Therefore, bar code scanners may also treat uneven print density, dust and scratches as part of the bar code. So when reading bar codes with low printing accuracy or fibers (such as cardboard) on the background, we need to pay attention to match the focal length and the narrow bar width.
The above is the different working principle of the red bar code scanner and the laser bar code scanner. Can you help me? Please find a professional supplier for the barcode scanner problem!