It started to be too complicated for me, I just found my scanner's noise
increase very fast with temperature, Olympus also mentioned E-10's CCD is
mount on the chassis that serves as a heatsink.
www.dpreview.com also did some test on the 3030 working at 10 and 24 C.
They have great different in noise level:
http://www.dpreview.com/reviews/olympusc3030z/page13.asp
Seeing the fact is much easier to deal with math calculation as there are
lots of factors that we don't know.
C.H.Ling
----- Original Message -----
From: <HI100@xxxxxxx>
<snip>
> four as the device heats up, this actually only produces sqrt(4)*0.5LSB or
1
> LSB of additional noise fluctuation.
>
> Noise in the CCD may be limited by other factors than just dark current in
> the detector layer. For example clocking out the data adds significant
noise.
> I seem to remember reading in Photonics and Spectra that the noise in CCD
> chips does not decrease much as temperature decreases unless the chips are
> specialy optimized for use cooled down. In other words for example if
clock
> noise say, increases with decreasing temperature (chip gets faster ) it
may
> partially or completely cancel detector layer dark current noise
decreases.
>
> Regards,
> Tim Hughes
> >>Hi100@xxxxxxx<<
>
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