Dark current definitions

Dark current

1) Analytical chemistry
Found on https://www.crosswordclues.com/clue/dark-current

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Dark current

[chemistry] In analytical chemistry, dark current refers to the constant response produced by a spectrochemical receptor, even in the absence of radiation. This response adds to the signal produced when the receptor is used to measure light and so must be dealt with to determine how much of the detector response is actually due to the radia...
Found on http://en.wikipedia.org/wiki/Dark_current_(chemistry)

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Dark current

[physics] In physics and in electronic engineering, dark current is the relatively small electric current that flows through photosensitive devices such as a photomultiplier tube, photodiode, or charge-coupled device even when no photons are entering the device. It is referred to as reverse bias leakage current in non-optical devices and is...
Found on http://en.wikipedia.org/wiki/Dark_current_(physics)

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dark current

the background current that flows in photoemissive and photoconductive detectors when no radiation is falling on the detector. It is a temperature-dependant effect, and can be decreased by many orders of magnitude by operating below -20C.
Found on http://www.chemistry-dictionary.com/definition/dark+current.php

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dark current

electric current flowing from the anode circuit in the absence of light on the photocathode
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=394-38-14

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dark current

the output current of a photosensitive device in the absence of intended irradiation
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=531-44-06

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dark current

the output current of an optical detector in the absence of incident radiation
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=731-06-33

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dark current

output current of a photoelectric detector or of its cathode in the absence of incident radiation
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-05-53

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dark current

<physiology> Current caused by constant influx of sodium ions into the rod outer segment of retinal photoreceptors and that is blocked by light (leading to hyperpolarization). ... The plasma membrane sodium channel is controlled through a cascade of amplification reactions initiated by photon capture by rhodopsin in the disc membrane. ... (18...
Found on http://www.encyclo.co.uk/local/20973

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Dark Current

a.k.a. noise, dark noise. Pixels collect signal-charges in the absence of light over time, which can vary from pixel to pixel, and the result is known as dark current. PowerShot digital cameras reduce or eliminate dark current before a picture is captured.
Found on http://www.encyclo.co.uk/local/21469

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dark current

(of retina) Current caused by constant influx of sodium ions into the rod outer segment of retinal photoreceptors, and that is blocked by light (leading to hyperpolarization). The plasma membrane sodium channel is controlled through a cascade of amplification reactions initiated by photon capture by rhodopsinin the disc membrane.
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Dark current

Leakage signal from a CCD sensor in the absence of incident light.
Found on http://www.zoo.co.uk/~z0001325/Glossary.html

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