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[filmscanners] RE: Newish Digital Tech
> >Hum. Do you have a source for that? I don’t believe that is
> >true, and will
> >have to think about your assertion. What is the source of the “random
> >variations”? I know there is some randomness in reception of photons,
> >simply because of atmospheric dispersion, and other causes...
>
> I think he is talking about the quantum noise which is introduced
> due to the
> Poisson probability distribution of the Photons hitting the detector. The
> resulting error in the signal is proportional to sqrt(2).
Hello Robert,
If he is, that’s called “shot noise” and it’s = sqrt(S), where S is the
signal in electrons. It certainly is the noise that limits CCD performance.
Austin
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