TYPES OF SCANNER

TYPES OF SCANNER 1. Scanner Drum

Drum scanners use technology photomultiplier tubes ( PMT ) to read the object to be scanned. The drum scanners are typically used to scan large images , although it could be to thumbnails . The advantages of this type of scanner is best to produce scanned images that detailed , accurate , and the most important advantages of this type of scanner is almost no vibration at all like the other type of scanner , so that the scanning process will not affect the scanned because of vibration tools. These types of scanners can produce scan resolution up to 24,000 ppi . Disadvantages of this type of scanner is its large size and the price is very expensive , and limited types of objects that can be scanned.

2. Scanner Flatbed

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This type of scanner uses CCD technology ( Charge Coupled Device ) or CIS ( Contact Image Sensor ) as the "eye " in reading the scanned object . This scanner is most commonly found and used , because its technology can be fairly inexpensive and are commonly used . The advantages of this scanner is that the CCD and CIS technology requires only a very low power to operate , so it is very often used with computers by taking electricity and distribute data from a computer's USB jack . A scan type scanner is fairly good for the needs of the scanned images and photos or documents . Disadvantages are the limited types of scanners scan only on one side of the object . Not effective if used in scan a document or image in large numbers . The development of this type of scanner to scan lawyer- khususan needs , sepertiScanner Books , Large Size Scanner A3 .

3. Scanner Film

Although using the same technology with eye scanner flatbed scanner types , namely the CCD ( Charge Coupled Device ) but the difference is this scanner to scan and convert data from a film negative or positive flim ( slide ) well . The advantages of this scanner is able to produce scanned very well and are large because of the scanned object " source " , a film negative . Disadvantages of this scanner is a fairly expensive and only to scan any object in the form of films .

4. Scanner Roller
he different types of scanners is the most fundamental is how " interesting " documents. If the scanner flatbed type moves " eye " scanner , while the Scanner Roller type is "exciting " to pass the document over a scanner eye . This process resulted in the withdrawal of documents quickly, so efficient in scanning documents numerous. Scanners of this type again divided into two groups , namely the ADF (Automatic Document Feeder ) and Sheet Feed , as follows :
	a. Scanner ADF (Automatic Document Feeder) ADF Scanner is a new type of scanner developed specifically to scan documents in large numbers. These scanners have a "place" to put the document you want to scan and then will be "pulled" automatically scanned, unlike the type Flatbed scanner that requires laying out each document you want to scan. The advantages of this type of scanner is the efficiency in scanning documents in large quantities, usually sorely needed in the modern enterprise. And even as their place to scan documents then produce proper position in each of them, so now many emerging conveniences that can be offered in this type of scanner, such as for example: Check Scanner LJK value. Disadvantages of this type of scanner is a fairly expensive and have parts that must be replaced after a scanner scanning a certain amount, namely: PaperPad and Roller her, nevertheless its spare-part prices affordable and easily replaceable.
	b. Scanner Sheet Feed Scanner type Sheet Feed Roller is similar to the way the ADF scanner , but does not have a " place " to put the paper / document, where the scanning process requires us to feed paper one by one . Scanners of this type is known as the Mobile Scanner / Scanner Notebook / Portable Scanner . The advantages of this scanner because of its small and power requirements are small , easy to carry anywhere and are usually used with a laptop / notebook . The process of sending data and electrical power can simply use the USB - port of your computer or laptop . High mobility and the dependence of the stability of our hands . Disadvantages of this scanner is the limited size of scanned documents , as well as spare-parts have to be replaced after a certain usage .

5. Scanner Tangan

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How to scan scanners of this type is to manually move it by hand on an object / document . This scanner can be distinguished by Hand Document Scanner and Scanner 3D ( 3 -dimensional ) . The advantages of this type of scanner is a high mobility offers simplicity in the process of scanning an object on any surface . And the price is quite cheap . Disadvantages of this type of scanner is its dependence on the stability of our hands in performing the scan , too fast , sloping and uneven surface scan can produce distorted images until unreadable . Sheet Feed Scanner so that usually an option successor