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photomultiplier
(redirected from Photomultiplier tubes)

   Also found in: Wikipedia, Hutchinson 0.03 sec.
photomultiplier: see photoelectric cell photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident upon it.
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Photomultiplier tubes are used in high-end drum scanners, because they are more sensitive to light than the CCD elements used in lower-cost devices.
Photomultiplier tubes are used in high-end drum scanners, because they are more sensitive to light than the CCD elements used in lower-cost devices.
The first step involves an operation called "profiling," which consists of manually tweaking the instrument alignment to achieve maximum light intensity on the photomultiplier tubes.
 
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