Scanner is a device that optically scans images, printed text, writing, any object and converts it into a digital image. Scanners commonly used in offices are variations of the desktop flatbed scanner in which the document is placed on a glass window for scanning. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original EssayTypes of ScannersDrumFlatbedScanner CCDScanner CISFilmHandDrum scanner: A drum scanner was the first image scanner developed for use with a computer. It was built in 1957. Drum scanners capture image information with photomultiplier tubes rather than the charge-coupled device (CCD) arrays found in flatbed scanners and inexpensive film scanners. The drum scanner gets its name from the clear acrylic cylinder, the drum, on which the original artwork is mounted for scanning. As the name suggests, it consists of a clear acrylic cylinder, the drum, onto which the original artwork is mounted for scanning. Drum scanners are capable of scanning both reflective and transmissive works of art.Flatbed scannerCCD scanner-CCD-(Charge-coupled devices)A CCD scanner is composed of a glass plate (or plate), under which is There is a bright light (often xenon, LED or cold cathode fluorescent) that illuminates the glass and a movable optical assembly in the CCD scan. CCD scanners typically contain three rows (arrays) of sensors with red, green and blue filters. CIS Scanner CIS-Contact Image Sensor. This consists of a moving set of red, blue and green LEDs that are illuminated with strobe light and is also connected with an array of monochrome photodiodes under a series of rod lenses for light collection. The images that the user needs to scan are placed with one face on the glass and an opaque cover is lowered over it that will exclude ambient light, and the array of sensors and the light source will move across the panel and begin to read the entire area. Therefore an image is visible to the detector only thanks to the light it reflects. Transparent images don't work this way and require special accessories to light them from above. Many scanners offer this as an option. Film scanner Uncut film strips of up to six frames, or four mounted slides, are inserted into a holder, which is then moved by a stepper motor through a lens and CCD sensor inside the scanner. Some models used primarily for same size scans. Film scanners vary greatly in price and quality. Consumer scanners are relatively inexpensive while the most expensive CCD-based professional film scanning system cost around $120,000. More expensive solutions are said to produce better results. Handheld scanner This type of scanner is moved over the subject to be photographed with the help of the hand. Two different types: 1.document2.3D scanner.Remember: this is just an example.Get a custom paper from our expert writers now.Get a custom essaySmartphone scannerAPPSsas1) aaDocument aascanningaxappssw mainly designed to handle as documents and sdoutput aaPDF, aae sometimes ddJPEG , files, 2) Photo scanning apps that generate JPEG files and have editing features useful for editing photos rather than documents; 3) Barcodes such as QR codes as scanning apps that then search the internet for information associated with the code.