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POS Machine Barcode Scanner Engine
Source:Powered | Author:admin | Time:2017-07-14 | Views:136

Barcode scanner engine from the scanning method can be divided into contact and non-contact two barcode scanner. The contact reading device includes a light pen and a card slot barcode scanner; the non-contact reading device includes a CCD scanner, a laser scanner.

POS Machine Barcode Scanner Engine
The barcode reading device can be divided into two kinds of barcode scanners, both hand-held and fixed, from the operating mode.

From the ability to read the code system to classify
Barcode scanning equipment can be divided into light pen, CCD, laser and shooting class 4 barcode scanners.
Light pen with card slot barcode scanner can only read one dimension barcode.


The laser barcode scanner can only read the row of two-dimensional code (such as PDF417 code) and one-dimensional code.
Image barcode reader can read the commonly used one-dimensional barcode, but also to read the row and matrix two-dimensional barcode.
Graphics acquisition and digitization There are two main ways to collect barcode graphics, namely “optical imaging” and “laser”. There are two optical imaging methods, one is the area array CCD, one is CMOS.


Select the two parameters of the CCD scanner module
(1) depth of field. As the CCD imaging principle is similar to the camera, if you want to increase the depth of field, the corresponding increase in the lens, so that the CCD volume is too large, inconvenient operation. Excellent CCD should be close to barcode can be read, and the volume is moderate, comfortable operation.


(2) resolution. If you want to improve the CCD resolution, it is necessary to increase the unit element of the photosensitive element at the imaging site. Low-cost CCD is generally 512 pixels (pixel), read EAN, UPC and other goods barcode is sufficient for other code systems will be difficult to read some. Mid-range CCD to 1024 pixels for more, and some even reach 2048 pixels, can distinguish the narrowest unit element 0.1mm barcode from the scanning method can be divided into contact and non-contact two barcode scanner. The contact reading device includes a light pen and a card slot barcode scanner; the non-contact reading device includes a CCD scanner, a laser scanner.

POS Machine Barcode Scanner Engine

The barcode reading device can be divided into two kinds of barcode scanners, both hand-held and fixed, from the operating mode.
From the ability to read the code system to classify
Barcode scanning equipment can be divided into light pen, CCD, laser and shooting class 4 barcode scanners.
Light pen with card slot barcode scanner can only read one dimension barcode.
The laser barcode scanner can only read the row of two-dimensional code (such as PDF417 code) and one-dimensional code.


Image barcode reader can read the commonly used one-dimensional barcode, but also to read the row and matrix two-dimensional barcode.
Graphics acquisition and digitization There are two main ways to collect barcode graphics, namely “optical imaging” and “laser”. There are two optical imaging methods, one is the area array CCD, one is CMOS.


Select the two parameters of the CCD scanner module
(1) depth of field. As the CCD imaging principle is similar to the camera, if you want to increase the depth of field, the corresponding increase in the lens, so that the CCD volume is too large, inconvenient operation. Excellent CCD should be close to barcode can be read, and the volume is moderate, comfortable operation.


(2) resolution. If you want to improve the CCD resolution, it is necessary to increase the unit element of the photosensitive element at the imaging site. Low-cost CCD is generally 512 pixels (pixel), read EAN, UPC and other goods barcode is sufficient for other code systems will be difficult to read some. Mid-range CCD to 1024 pixels for more, and some even reach 2048 pixels, can distinguish the narrowest unit element 0.1mm barcode.

 
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