Barcode scanner, do you know this knowledge?
Barcode scanners are devices with complex parameter settings. These key parameters are also factors that users must consider when choosing to use a bar code scanner, such as resolution, scan speed, scan width and speed.
For barcode scanners, the resolution is the correct detection of the width of the narrowest stripe that is read. When selecting a device, it is not the higher the resolution of the device, but the bar code scanner with the corresponding resolution is selected according to the bar code density used in the specific application. In use, if the resolution of the selected device is too high, the influence of stains, deinking, etc. on the bar code symbol on the scanning system will be more serious.
Scan depth of field
Scanning depth of field refers to the difference between the farthest distance that the scan head allows to leave the surface of the barcode and the closest point to which the scanner can approach the surface of the barcode, ensuring reliable reading, which is the effective working range of the barcode scanner. Some bar code scanner scanning devices do not give a scanning depth of field indicator in the technical specifications, but give a scanning distance, that is, the shortest distance that the scanning head allows to leave the surface of the barcode.
Scan width and speed
The scan width index refers to the physical length value of the bar code information that the scanned beam can read at a given scan distance. The scanning speed refers to the scanning frequency of the scanning beam on the scanning track per unit time.