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.
References in periodicals archive ?
Fingerprint scanning technology and an optical proximity sensor are used to recognize a ring's owner so that not just anybody can pick up your Token ring and use it to access all your digital information.
When used with optical proximity sensors, the IC accurately detects objects in ambient light and sunlight conditions.