Hand scanner
Hand scanners are scanners , where the leadership of the optical line does not automatically but by hand is done by the user.
The first devices were wired and usually captured about 10 cm wide strips per scan movement. If necessary, an entire page was then put together from the individual strips using software . The straight leadership was supported by roles. In connection with a pulse generator, these roles also record the distance covered over the template and thus the second dimension. The process is very imprecise and time-consuming. It was often a cheap solution compared to desktop scanners, which has disappeared from the market because of its disadvantages and the now inexpensive flatbed scanners .
In the late 1990s, hand-held scanners that could scan individual lines and had integrated OCR software appeared. They are also called digital highlighters . There are similar devices with built-in translation software.
New developments allow the scanning of strips around 20 cm wide, so that a DIN A4 page can be scanned with one scanning movement. The software can give a signal if the device is moved too fast and the scan fails. The possible speed has increased significantly to up to 2 to 4 seconds per side, depending on the color setting. The devices are battery-operated and save on microSD or send it to the desired device via Bluetooth or WLAN . One also speaks of mobile (document) scanners , but this also includes small, mobile feed-in scanners ; or as a distinguishing feature of book scanners . Today they are mostly additional devices for working with them on the go.
Mobile barcode readers are also often referred to as hand scanners.
Two first generation hand scanners
"C pen"
Hand-held scanner in A4 width
