scanner

A scanner is an electronic device that captures an image or document by scanning it and converting the data into a digital format. This data can then be stored or sent electronically. There are various types of scanners, including flatbed scanners, sheetfed scanners, and handheld scanners.

Flatbed scanners are the most common type and consist of a flat glass surface and a mechanical assembly that moves the light source and sensor across the surface. These scanners are usually used for scanning flat documents and photographs. Sheetfed scanners are designed for high-speed scanning of large numbers of documents, such as receipts and invoices. They typically have a roller mechanism that guides the documents through the scanning process.

Handheld scanners are portable devices that can be used to scan barcodes, QR codes, and other types of linear codes. These scanners are often used in retail environments and inventory management. There are also specialized scanners for tasks such as document capture, medical imaging, and security screening.

Scanners may use various technologies, including Charge-Coupled Devices (CCDs), Contact Image Sensors (CIS), and Line Cameras. Some scanners also have features such as auto-document feeder, duplex scanning, and multi-language support. The resolution of a scanner, measured in dots per inch (DPI), determines the level of detail that can be captured.

Scanners are widely used in various industries, including education, healthcare, and finance, for tasks such as document management, data entry, and inventory control. They are also popular among consumers for scanning photos and documents at home. Overall, scanners play an essential role in converting physical documents into digital formats, making data management more efficient.