English Dictionary

Pioneers in dictionary publishing since 1819

light pen

Definitions

noun

  1. (computing)
    1. a rodlike device which, when applied to the screen of a cathode-ray tube, can detect the time of passage of the illuminated spot across that point thus enabling a computer to determine the position on the screen being pointed at
    2. a penlike device, used to read bar codes, that emits light and determines the intensity of that light as reflected from a small area of an adjacent surface

Example Sentences Including 'light pen'

Although the original programming for a light pen is complicated its use can enable designs to be created and changed very quickly.
Samways, B. & Byrne-Jones, T. Computers Basic Facts

Comments

Log in to comment on this word.