That part of a facsimile transmitter which systematically translates the densities of the elemental areas of the subject copy into corresponding electric signals.

In character recognition, a magnetic or photoelectric device which converts the input character into corresponding electric signals for processing by electronic apparatus.

1. Any device that examines an area or region point by point in a continuous systematic manner, repeatedly sweeping across until the entire area or region is covered; for example, a flying-spot scanner.

2. A device that automatically samples, measures, or checks a number of quantities or conditions in sequence, as in process control.