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photodetector
(redirected from Photo detector)

   Also found in: Wikipedia 0.12 sec.

photodetector

A device that senses light. It uses the principle of photoconductivity, which is exhibited in certain materials that change their electrical conductivity when exposed to light. See photoelectric, photocell and photodiode.



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nbsp;on the photons, such as setting up a photo detector to read the code, disrupts them, making the codes unusable and alerting the network to the snooper.
These high resolution optical encoders also incorporate an LED light source and photo detector IC in a single leadless package, and uses reflective technology to sense rotary or linear position.
These high resolution optical encoders also incorporate an LED light source and photo detector IC in a single leadless package, and uses reflective technology to sense rotary or linear position.
 
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