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Weak electric current generated by photosensitive devices in pure darkness
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 enter the device; it consists of the charges generated in the detector when no outside radiation is entering the detector. It is referred to as reverse bias leakage current in non-optical devices and is present in all diodes . Physically, dark current is due to the random generation of electrons and holes within the depletion region of the device.[1]
Dark current is one of the main sources for noise in image sensors such as charge-coupled devices. The pattern of different dark currents can result in a fixed-pattern noise ; dark frame subtraction can remove an estimate of the mean fixed pattern, but there still remains a temporal noise, because the dark current itself has a shot noise .
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R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Dark_current_(physics)&oldid=1225591074 " C a t e g o r i e s : ● E l e c t r o n i c e n g i n e e r i n g ● O p t o e l e c t r o n i c s ● O p t i c s s t u b s ● E l e c t r o n i c s s t u b s H i d d e n c a t e g o r i e s : ● A r t i c l e s n e e d i n g a d d i t i o n a l r e f e r e n c e s f r o m J a n u a r y 2 0 2 4 ● A l l a r t i c l e s n e e d i n g a d d i t i o n a l r e f e r e n c e s ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n i s d i f f e r e n t f r o m W i k i d a t a ● A l l s t u b a r t i c l e s
● T h i s p a g e w a s l a s t e d i t e d o n 2 5 M a y 2 0 2 4 , a t 1 3 : 0 4 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
