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photodetector |
Also found in: Wikipedia, Hutchinson | 0.09 sec. |
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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. 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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| A photodetector gleans data from the disc by tracking the changing brightness of a laser beam that bounces off the pitted layer. The use of two photodetectors yields an improvement best explained by first considering how the photodetector output signals for single and dual detector interferometers are similar. The telescope is the Arctic Muon and Neutrino Detector Array II (AMANDA II)--a collection of hundreds of sensitive photodetectors sunk deep into the South Pole ice (SN: 3/27/99, p. |
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photodetector
