How many types of barcode scanner guns are there? Do all barcode guns support barcodes of different code systems?

There are many types of scanner guns, the following three common types:

1, hand-held scanner guns. The vast majority of hand-held scanner using CIS technology, optical resolution of 200dpi, black and white, grayscale, color multiple types, including color type is generally 18-bit color. There are also individual high-grade products using CCD as a photoreceptor, can realize the bit true color, scanning effect is better.

2, small drum scanner. The vast majority of such products using CIS technology, optical resolution of 300dpi, color and grayscale two kinds of color models are generally 24-bit color. There are also a small number of small drum scanner using CCD technology, scanning effect is significantly better than the CIS technology products, but due to structural limitations, the volume is generally significantly larger than the CIS technology products.

3, platform scanner. Most of the scanners on the market today belong to the flatbed scanner, is the mainstream today. This type of scanner gun optical resolution between 300dpi-8000dpi, color bits from 24 to 48 bits, scanning format is generally A4 or A3. flatbed benefits like using a copier. All barcode guns support different code systems.

Expanded Information:

< p>The common flatbed barcode scanner is generally composed of a light source, optical lens, scanning module, analog-to-digital conversion circuitry plus a plastic case. It uses photoelectric components to convert the detected light signal into an electrical signal, and then the electrical signal through the analog-to-digital converter into a digital signal transmitted to the computer for processing.

When scanning an image, the light source irradiated to the image after the reflected light through the lens will converge to the scanning module, by the scanning module to convert the light signal into an analog digital signal, at the same time pointed out that the number of gray and dark degree. The analog-to-digital conversion circuit converts the analog voltage into a digital signal that is transmitted to the computer.

If there is a higher number of quantization bits, means that the image can have a richer level and depth, but the color range has exceeded the human eye's ability to identify, so in the discernible range, the higher number of bar code scanner scanning out the effect is the color of the articulation of the smooth, able to see more details of the picture.

Baidu Encyclopedia - Barcode Scanner Gun