Scanner / محمد الطالب اعداد خطاب

الجامعي / الرقم120060803

أحمد / االستاذ اشراف أبومسامح

How does the scanner?

A scanner device (Alascanr), one of the necessary accessories for the computer and is one of the important organs in the office during the past few years. And scanning technology has spread everywhere and are now used in many ways and devices scanners.

(1) Flatbed scanners

Scanner Flatbed scanners flat and this type most commonly used and works by installing the paper to be fed into a computer scanner that will remain stable place and the light of the scanner scans the paper.

(2) Sheet-fed scanners

Scanner with a manual feed Sheet-fed scanners It works by pulling the paper into the scanner to exposed to constant light source is characterized by small size and used with laptops

(3) Handheld scanners

Scanner manual Handheld scanners is smaller and the scan manually. This type of scanner does not give the high image quality, such as those provided by the scanners, flat, but it may be feasible in a quick scan of the texts.

(4) Drum scanners

The scanner cylindrical Drum scanners used in the publishing institutions and the superiority of its accuracy in all kinds of the above-mentioned different idea of working for scanners proving the paper cylinder glass and shine the light from inside the cylinder to illuminate the paper and the device is sensitive to the light of the so-called tube enlarge photons photomultiplier tube and a PMT to convert light Almeks the electric current

importance of scanners

The importance of scanners enable users to convert documents and images files to deal with the computer to be processed and saved and printed or posted on the Internet and scanners are devices that convert analog information to digital analog digital

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