First, holding a scanning gun
The hand-held scanning gun is a product formed by the technology introduced by 1987, and its appearance is very similar to the barcode scanning gun used by supermarket cashiers. The vast majority of hand-held scanning guns adopt CIS technology with an optical resolution of 200dpi. There are many types such as black and white, gray scale and color, among which the color type is generally 18 bit color. There are also some high-end products that use CCD as photosensitive device, which can realize true color and good scanning effect.
Second, the small roller scanning gun
This is an intermediate product of hand-held scanner and platform scanner (there are also new products in recent years, so it is called notebook scanner because of its built-in power supply and small size). Most of these products adopt CIS technology, with an optical resolution of 300dpi, and there are two kinds of color and gray scale, and the color model is generally 24-bit color. There are also a few small roller scanning guns with CCD technology, the scanning effect is obviously better than that of CIS technology products, but due to structural limitations, the volume is generally obviously larger than that of CIS technology products.
The design of the drum is to fix the lens of the scanning gun and move the scanned object through the lens. When it works like a printer, the scanned object must pass through the machine and then be sent out. So the scanned object cannot be too thick. The biggest advantage of this kind of scanning gun is its small size, but there are many restrictions in its use, such as scanning only thin paper and its range cannot exceed the size of the scanning gun.
Third, the platform scanning gun
Also known as flat-panel scanning gun and desktop scanning gun, most of the scanning guns on the market are flat-panel scanning guns, which is the mainstream now. The optical resolution of this scanning gun is between 300 dpi and 8000 dpi, the number of color bits is 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 copier, you can put books, newspapers, magazines and photo negatives on it for scanning as long as you open the upper cover of the scanning gun, which is quite convenient and the scanning effect is the best among all common types of scanning guns.
Others include large format scanner, pen scanner, barcode scanner, negative scanner (note that it is not a flat scanner with through scanning, the effect is much better, and the price is of course expensive), and physical scanner (it is not a flat scanner with physical scanning ability, somewhat similar to a digital camera), which is mainly used as a roller scanner in the field of industrial printing and typesetting.
The different types and uses of scanning guns make the price of scanning guns vary widely, and the scanning guns from several hundred yuan to thousands of yuan are also different because of the different appearance and use environment. Choosing the right scanning gun will make the workflow easier and more convenient.
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