optical proximity sensor
optical proximity sensor
[′äp·tə·kəl präk′sim·əd·ē ‚sen·sər] (engineering)
A device that uses the principle of triangulation of reflected infrared or visible light to measure small distances in a robotic system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.