There are many types of barcode scanners, common are the following:
Handheld barcode scanner
The handheld bar code scanner is a product of a technology introduced in 1987 that resembles the bar code scanners used by supermarket cashiers. The vast majority of bar code scanner adopts CIS technology, the optical resolution is 200dpi, there are black and white, gray, color a variety of types, color type is generally 18 bit color. There are also some high-grade products using CCD as a photosensitive device, can achieve true color, scanning effect is better.
Small drum bar code scanner
This is the intermediate product of handheld barcode scanner and desktop barcode scanner (there are new products in recent years, because of the built-in power supply and small volume is called notebook barcode scanner). Most of this product adopts CIS technology, the optical resolution is 300dpi, there are two kinds of color and gray scale, and the color model is generally 24-bit color. There are also a few small cylinder bar code scanner using CCD technology, the scanning effect is obviously better than CIS technology products, but because of the structure limit, the volume is generally significantly larger than CIS technology products. The design of the small cylinder is to fix the lens of the bar code scanner, and move the object to be scanned through the lens to scan, which works like a printer. The object to be scanned must be sent through the machine, so the object to be scanned cannot be too thick. The biggest advantage of the bar code scanner is that it is very small, but it can't be used beyond the size of the bar code scanner because it can only scan thin paper, for example.
Platform bar code scanner
Also known as flat bar code scanner, desktop bar code scanner, currently in the market most of the bar code scanner are flat bar code scanner, is now the mainstream. The optical resolution of this type of barcode scanner is between 300dpi-8000dpi, the color number ranges from 24 to 48, and the scanning format is generally A4 or A3. The advantage of the flat type is that, just like using a photocopier, the top cover of the bar code scanner can be put on to scan whether it is a book, a newspaper, a magazine or a photo negative, which is quite convenient, and the result of scanning is also the best of all the common types of bar code scanners.
And large surface scan with large barcode scanners, pen type barcode scanners, barcode scanner, film scanner (not flat bar code scanner sweep through, effect is much better, also expensive), physical bar code scanner (not real scanning ability of planar bar code scanner, is similar to digital cameras), and is mainly used in industry in the field of typography drum barcode scanner, etc.