Optical scanner. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/optical-scanner
A device that converts printed images and text into digital information that can be edited, transmitted, and stored. Optical scanners work by electronically measuring the intensity of color at a large number of individual locations across the page (often using phototransistors),
and converting these measurements into digital numerical values usable by computers and other digital devices.