opticalsensor
nounUK /ˈɒptɪkəl ˈsɛnsə/
US /ˈɑːptɪkəl ˈsɛnsər/
A tiny device that uses light to notice things around it.
The robot's optical sensor helped it see the edge of the table.
OTHER MEANINGS
2. A part in a computer mouse that tracks movement using light.
The optical sensor in the mouse made the cursor glide smoothly.
3. A device in a phone camera that turns light into pictures.
The phone's optical sensor captured a bright, clear photo.
4. A tool on a machine that checks if something passes by using a beam of light.
The optical sensor counted each box on the conveyor belt.