optical character
Technical term used in fields such as OCR (optical character recognition). Refers to characters designed to be read by optical devices.
Optical character recognition is a technology that converts paper documents into digital data.
光学文字認識 is the full term for OCR, while 光学文字 refers specifically to the characters themselves.
optical character recognition; OCR
Compound of 光学 (optics) and 文字 (character), likely a calque from English 'optical character'.