A scanners basic function is to analyze, scan and convert an image, document or handwriting into a digital image. And the flatbed scanner precisely does that. It is one of the most popular and commonly seen scanners in the United States. The flatbed scanner is a functional and compact device that is widely used to scan pictures and documents.
Technically a flatbed scanner is a device that is composed of a glass pane or platen, which it is usually known as, under which there is a bright light, often xenon or cold cathode fluorescent that illuminates the glass pane. The next part, which is important in the scanning process in a flatbed scanner, is a moving optical array, which is usually CCD (charged coupled device) or CIS (Contact Image Sensor). The color flatbed scanners typically contain three rows or arrays of sensors with red, green, and blue filters. In a typical case images to be scanned are placed face down on the glass and the sensor array and light source moves across the pane reading the entire area of the bed or glass pane of the scanner. This image is therefore visible to the charge-coupled device only because of the light it reflects. The only exception to the flatbed scanners are the transparent images or transparencies that do not work in this way, and require special accessories like the transparency adapter that illuminate them from the upper side.
The flatbed scanner is available in many prices, which depend on the features such as optical resolution, color depth, and other such aspects. |
