There are many types of barcode scanners on the market, which can be divided into three categories according to the scanning principle: one-dimensional (1D) laser barcode scanners, one-dimensional (1D) red light barcode scanners and two-dimensional (2D) image barcode scanners. Разница между ними заключается в разнице сканирующей головки.Следующий редактор Honor Way Electronics поможет вам понять различия между тремя типами сканеров штрих-кода с 4 аспектов, чтобы вы могли выбрать подходящий для вас сканер штрих-кода.
Пункт 1: это работает по-другому
The working principle of the 1D laser barcode scanner: The laser barcode scanner emits a small beam of light through a laser diode, which is irradiated on a rotating prism or a mirror that swings back and forth, and the reflected light passes through the barcode scanner window and illuminates the barcode. On the surface, the light returns to the barcode scanner window through the bar code bar and the spaces reflection. The barcode scanner collects information and focuses, then converts the light signal into an electrical signal through photoelectric conversion, and then transfers the electrical signal into a digital signal, and outputs the barcode information to a computer and other equipment.
1D red light barcode scanner working principle: Red light barcode scanner is also called CCD barcode scanner. The red light barcode scanner is mainly composed of CCD (photoelectric coupling) sensor, camera, LED lighting, cylindrical mirror and MCU. The LED light is condensed into a wide red light through the cylindrical mirror and irradiated on the barcode. The CCD sensor obtains the bar and space information of the barcode through the optical lens for imaging, and converts the analog signal into an electrical signal. Finally, the barcode information is transmitted to the computer and other equipment.
Working principle of 2D image scanner: 2D image barcode scanner is mainly composed of camera, CMOS sensor, lighting, aiming light and MCU chip. The barcode scanner illuminates the barcode with lights when it is working, the CMOS sensor obtains the barcode image through the camera, and parses the barcode information through the software algorithm of the MCU and outputs it to the computer and other equipment.
Пункт 2: сканирующий свет отличается
The scanning light of the 1D laser barcode scanner is a very thin light emitted by the laser diode and reflected by the prism or mirror, and the barcode information is read after aiming at the barcode by the light;
The scanning light of the 1D red bar code scanner is a thicker light emitted by the LED lighting and collected by the cylindrical mirror, and the bar code information is read after aiming at the bar code through the light;
The scanning light of the 2D image barcode scanner is divided into two parts, LED lighting fill light and aiming light. LED lighting provides the light source for the camera. The aiming light is generally red or white LED light that is focused by a prism into a relatively concentrated light to find the position of scanning the barcode. Aiming lights generally have a strip shape, a circle shape or a box shape.
Пункт 3: различные типы читаемых штрих-кодов
1D laser and 1D red barcode scanners can only read 1D barcodes. The 2D image barcode scanner can read 1D and 2D barcodes at the same time.
Пункт 4: разница считывания штрих-кода разных носителей
1D laser barcode scanner can usually read barcodes on paper and other diffusely scattering materials, but cannot read barcodes on screens and highly reflective materials. 1D red light and 2D image barcode scanners use image reading, which can not only read paper and screen barcodes, but also have good performance for some highly reflective, water-stained and stained barcodes.
From the above four aspects, we can clearly understand some differences and commonalities between 1D laser, 1D red light and 2D image barcode scanners. This is of great help in guiding us to choose the right product.