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photodetector |
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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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If the reference path is adjusted so that the phase difference between the reference and sample beams is an integer multiple of [phi]/2, the levels of optical power falling on the two photodetectors will be equal. Orders of Magnitude Cost-Savings, Making Photodetectors Virtually Free -- The compact, low-cost photodetectors have increased sensitivity that can detect a single quantum of light and may significantly reduce the cost of future PET scanners while improving spatial resolution and portability. |
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