Special requirements for infrared astronomy include : very low dark currents to allow long integration times, associated low noise readout circuits and sometimes very high pixel counts.
32.
In addition, the improved graphene / n-Si heterojunction photodetectors possess high responsivity of 0.73 A W " 1 and high photo-to-dark current ratio of H " 107.
33.
Dark current contributes two kinds of noise : dark offset, which is only partly correlated between pixels, and the shot noise associated with dark offset, which is uncorrelated between pixels.
34.
A thin insulating layer, such as silicon dioxide, can reduce rates of electron-hole pair recombination and dark current by allowing the possibility of minority carriers to tunnel through this layer.
35.
We should use rational argument when we can, but we ignore at our peril that we are also a lightning rod for dark currents of hatred that flow through the psyche.
36.
Unofficially, this telephone tiff has exposed a dark current of national chauvinism and aggression _ just the sort of thing the new age of globalism is said to be rendering obsolete.
37.
Yes for my purposes it is sufficient to understand the dark current as being that which flows in the diffusion direction in a darkened cell, and balances out the drift current.
38.
The mean dark current contains contributions proportional both to the area and the linear dimension of the photodiode, with the relative proportions and scale factors depending on the design of the photodiode.
39.
Catalina Sky Survey ( CSS ) utilized two US telescopes, a 1.5 meter ( 60 inch ) f / 2 telescope on the peak of dark current is about 1 electron per hour.
40.
To compensate for this extra signal, the dark current may be measured in the absence of radiation and then subtracted from the final signal or reduced to zero by a compensating blank correction.
