What are three types of scanner?Explain their working in brief.
Answers
Answer:
Explanation:
Flatbed Scanner
A flatbed scanner is made up of a glass pane and a moving optical CIS or CCD array. The pane is illuminated with the help of bright light planted underneath it. The image―the one that is to be scanned―is then placed on the glass pane. The sensor and source of light move across the glass pane to scan the document and produce its digital copy. If you want to scan transparent slides on your flatbed scanner, you will require a transparency adapter. Flatbed scanners derive their name from the fact that their glass plane or bed, where the object to be scanned is placed, is flat.
Handheld Scanner
A handheld scanner is a small manual scanning device which is moved over the object that needs to be scanned. In flatback and sheetfed scanners, you put the document that is to be scanned inside the device. In contrast, in the case of heldheld scanner, you have to drag it over the document that is to be scanned. Using a handheld scanner can be a cumbersome task as the hand needs to be steady all the time. Even a slight movement of hand can lead to distortion of the image. One of the most-utilized handheld scanner is the barcode scanner, typically used in shopping stores to valuate goods.
Photo Scanner
As the name itself suggests, a photo scanner is mostly used to scan photographs. It boasts of high resolution and color depth, both of which are necessary for scanning photographs. If you want to buy a scanner to digitize film negatives and slides, then the photo scanner is your best bet. While flatbed scanners can also scan your photographs for you, they are not as fast as dedicated photo scanners. It's also worth noting that the in-built software in some photo scanners helps in cleaning and restoring old photographs.
Answer:
1. Photo Scanner
2. Handheld Scanner
3. Flatbed Scanner