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.
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.