The scanner is an essential office accessory today because within seconds documents, books and slides can be copied faithfully. Scanners can be used at home, office or a shop. Depending on the use one can select the best available scanner whether it is the flat bed scanner, desktop scanner or the hand held laser barcode scanner. Each of these devices functions for different purposes.
For home or office use the flat bed scanner is an especially sought after device because of its easy and simple operability. The loading is done manually in some brands whereas others have the facility to be loaded automatically without any assistance. There is also a facility for automatic duplexing which means that both sides of the paper or document is automatically scanned. This is especially useful when the volume of work is greater. Some devices are as light as 3.8 kilograms and can be placed anywhere. There are the heavier ones weighing a little over 8 kilograms.
The colour resolution is as high as 4800 horizontally and 9600 vertically. The USB port helps to connect to other external devices and there is very easy transference. For colour scanning there is 24 or 48 bit colour compatibility and 8 bit for grey levels. However even with 24 bit there are about 16.7 million colours. The different media are plain paper, books, films and slides. Different sizes like envelope, postcards and paper can be printed very effectively.
Most scanners offer a storage capacity of up to fifty sheets while there are others providing a storage capacity of a hundred sheets. The desktop scanner is the best because it is portable and can accommodate any kind of media. However some scanners are compatible only with a PC. One must therefore choose the scanner that suits the existing system. The scanning speed can anywhere between 60 to 110 pages per minute.
The handheld laser barcode scanner is very useful to scan bar codes on gift items like video games, sports goods, jewels, flowers, books etc. This is obviously useful in busy commercial establishments where the items need to be speedily scanned and the hand held device makes it easy to manoeuvre. Some scanners which are not handheld can be tilted at a convenient angle to read barcodes.
The extra CCD scanning element offers better and higher quality levels of scanning by using the Image enhancement technology and Dynamic Threshold technology.
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