CCD is an electronic coupling device, which is suitable for close-range and contacts reading like bluetooth barcode scanner. Its price is cheaper than laser readers and there are no moving parts inside.
The light-transmissive scanning window of bluetooth barcode scanner is made of special tempered material, which is more resistant to breakage and lighter in light transmittance, making the depth of field farther. The gun body plastic conforms to the national standard production process with high-temperature resistance, corrosion resistance and is easy to clean. It gives no odor as well. The gun line can be removed with a pin with convenient operation.
The ergonomic design of bluetooth barcode scanner is perfect whose buzzer sound is loud and small, the shock absorption is reasonably equipped from the beginning to the end, and it can stand multiple 2m drop ground test.
The CCD reader uses one or more LEDs to emit light that covers the entire bar code. The image of the bar code is transmitted to a row of light, sampled by each individual photodiode, and the adjacent detection result of “black” or ” “white” distinguishes each bar or space to determine the character of the bar code. In other words, the CCD reader does not pay attention to reading each “bar” or “empty”, but the entire part of the bar code and converts it into a decodable electrical signal.
Compared with other readers, bluetooth barcode scanner is more convenient, but the same is true for reading barcodes. It weighs less than a laser reader and is not as accessible as a light pen.
The limitation of bluetooth barcode scanner is that it has a reading depth of field and a reading width. It is difficult to read barcodes printed on curved surfaces such as beverage cans. It is not very suitable in some places where long-distance reading is required, such as warehouses. CCD bluetooth barcode scanner is not a good choice when the bar code to be read is wide, bar code with long information or low density is easy to exceed the scan head and in some bar code readers that use multiple LEDs, any one of the LED faults will result in the inability to read. Most CCD readers have a lower first reading success rate and a higher probability of error.
The resolution of bluetooth barcode scanner is equal to the resolution of its optical components plus its own resolution obtained by processing analysis by hardware and software. The optical resolution is the actual number of spots that the optical components of the bar code scanner can capture in an area per square inch. It refers to the physical resolution of the bar code scanner CCD and is also the true resolution of the bar code scanner. Its value is obtained by dividing the pixel point that the photoelectric element can capture by the maximum scannable size of the bar code scanner. The optical scan and output are one to one correspondence,that is, what is scanned is output. The output image will become more realistic and the resolution will be higher after being processed by computer hardware and software. Most barcode scanners currently on the market have software and hardware extensions for resolution. Some bluetooth barcode scanner advertisements 9600×9600 DPI, which is only the maximum resolution obtained by software interpolation, not the true optical resolution of the barcode scanner. So for bar code scanners, the resolution has optical resolution and maximum resolution. We are concerned, of course, with optical resolution. This is hard work. We say that a bar code scanner has a resolution of up to 4800 DPI (this 4800 DPI is the sum of optical resolution and software difference processing), which means that when a barcode scanner is used to input an image, it can be acquired on a 1 square inch scanning surface. 4800×4800 pixels, for example, an image size of 4800×4800 pixels is produced in a 1-inch square scan area when scanned at a resolution of 4800 DPI.