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photosensor

   Also found in: Wikipedia 0.06 sec.

photosensor

A light-sensitive device that is used in optical scanning machinery. See photoelectric.



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Its ommatidia must extend deeper and meet up with an array of microelectronic photosensors.
Each system was controlled by a photosensor, which ensured that the LED lighting did not come on during the day or when the overhead lights were on, and by a motion sensor that slowly turned the lights on when the resident put his/her feet on the floor or when a nurse walked into the room.
A photosensor detects whether the lid is facing up or down just before it passes through a spinning tube.
 
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