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Barcode Scanning Module is also known as Barcode Scanning Module, Barcode Scanning Engine, in English (Barcode Scan Engine or Barcode Scan Module). It is a core identification component widely used in the field of automatic identification. It is one of the key components for the secondary development of barcode scanners. It has complete and independent barcode scanning and decoding functions, and can write various industry application functions as required. It has small size and high integration, and can be easily embedded in mobile phones, tablet computers, printers, assembly line equipment, medical equipment, and other equipment in all walks of life. In the development process, the barcode scanning module industry in foreign countries is relatively early, and the technology is relatively mature. The relatively large ones include Honeywell, Motorola, Symbol, etc. 

1：Classification The barcode scanning module can be divided into one-dimensional code module and two-dimensional code module according to the similarity of scanning, and can be divided into laser module and red light module according to the light source. Difference between laser module and red light module The principle of the laser scanning module is that the internal laser device produces a laser light source point, hits a reflective sheet with a mechanical structure device, and then relies on the vibration motor to swing the laser point into a laser line and shines on the barcode, and then decodes it through A-D. Digital signal. 

2：Red light scanning modules generally use LED light-emitting diode light sources, rely on CCD photosensitive elements, and then convert them through photoelectric signals. Most of the laser scanning modules rely on dispensing glue to fix the mechanical device, so it is often easily damaged when it swings, and the pendulum piece falls off, so we can often see that the light source scanned by some laser guns becomes a point after falling. , resulting in a fairly high rework. There is no mechanical structure in the middle of the red light scanning module, so the drop resistance is incomparable to the laser, so the stability is better, and the repair rate of the red light scanning module is much lower than that of the laser scanning module.

3：From the physical principle of laser and red light: Laser refers to light with strong stimulated radiation energy and good parallelism, and now most of the red light is emitted by LEDs. Red light is not the kind of infrared we say. The infrared defined by physics is the spontaneous radiation of objects with temperature. electromagnetic waves, invisible. Infrared includes all light with wavelengths greater than red light, while laser refers to light with a certain wavelength. The two have no necessary connection and do not belong to the same field. Laser is the radiation generated by the amplification of stimulated emission. Infrared is the part of the spectrum with lower frequency and larger wavelength that cannot be observed by the naked eye. The wavelength is from 0.76 to 400 microns. The penetration and anti-interference of light are worse than that of laser, so outdoor laser is better than red light under strong light.