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photodetector |
Also found in: Wikipedia | 0.02 sec. |
photodetectorA 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. photodetector [¦fōd·ō·di′tek·tər] (electronics) A detector that responds to radiant energy; examples include photoconductive cells, photodiodes, photoresistors, photoswitches, phototransistors, phototubes, and photovoltaic cells. Also known as light-sensitive cell; light-sensitive detector; light sensor photodevice; photodevice; photoelectric detector; photosensor. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Last night at work a waitress, Shelley, received a photo message on her photo cell phone. Normally, security lighting will come on when sunlight diminishes to a certain point during the evening, triggering a photo cell attached to the system. If the sand is dry, it falls through a slot where a photo cell sensor detects the material and adds water to the muller. |
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