Interesting Tom, the one reference you gave says that CCD's used in photo
cameras don't usually
have an antirefletive coating and that the Silicon loses a large 30% fom the
surface reflection.
It may be it is difficult to coat cheaply in consumer gear, because of
non-planar surface?
Tim Hughes
--- tOM Trottier <tOM@xxxxxxxxxxxxx> wrote:
>
> The astronomers well understand that cooling sensors results in both less
> noise and less signal
> decay. See
> http://www.astrophys-assist.com/educate/noise/noise.htm and
> http://www.andor-tech.com/library/digital_Cameras/index.asp?app=316
>
> They have a variety of ways of post processing to reduce noise.
>
> tOM
>
> On Tuesday, October 03, 2006 at 21:06,
> Moose <olympus@xxxxxxxxxx> wrote:
>
> > AllanDan wrote:
> > > Digital noise is due to sensor heat <i>and</i> optics.
> > As Chuck Suggests. it's probably more than just that and probably gets
> > into arcana of chip physics.
> > > I didn't think it important to make the distinction because I was merely
> > > offering a work
> around based on my experience.
> > >
> > I absolutely agree. The nature of the problem and how to deal with it
> > are more important than the cause.
> >
> > I was just taken with images of stray charges running 'downhill' from
> > full to empty areas on a chip (sort of like images of flowing lava) and
> > of rogue light sneaking over where it wasn't supposed to be, just to
> > make trouble. Probably the teenage photons that do it. :-)
> >
> > Moose
> >
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