dark current


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dark current

n.
Unwanted current or signal in a photodetector in the absence of incident light, resulting from thermally excited electrons or leakage of current along the current path.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

dark current

n
(Electrical Engineering) the residual current produced by a photoelectric device when not illuminated
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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The vast canopy of woods spread itself to the margin of the river, overhanging the water, and shadowing its dark current with a deeper hue.
Toby led us to the very edge of this, and there stood whining, looking out on the dark current beyond.
A standard part of the processing of spacecraft vidicon images is therefore to subtract this variation, called a "dark current." The change is often a small one, making little difference except to images of extremely faint features.
In a UV photodetector, large Schottky barrier height at metal semiconductor interface results in improved responsivity and improved photocurrent to dark current ratio [33, 34].
Typical responsivity is at 0.44 A/W with typical reverse dark current at 5 nA and total capacitance, typically at 25 pF.
The chip has anti-blooming protection (to prevent streaks on bright stars), high sensitivity, and low dark current, which is further reduced by a regulated, two-stage thermoelectric cooler that can bring the chip to as much as 35[degrees] C below ambient air temperature.