What is depth of field
The depth of field represents the maximum length of the bar code scanner from the bar code scan.
Some bar code density is very high, so the need for high precision bar code scanner, their distance is required, and this is also according to the density of the bar code to choose the bar code scanner.
The depth of field of the barcode scanner is related to the density of the barcode to be scanned. For example, a scanning gun can scan the barcode with a density of 10MIL, which can be attached to the scanning gun for scanning recently, and the maximum distance of the scanning gun is 20CM, so the depth of field of the scanning gun on the bar code of 10MIL is 0-20cm.