Somewhere in the archives of this list there was a discussion about
cleaning front surface mirrors, I believe. I think a camera repairman
provided a primer on the method without damaging the surface.
You may be correct that the inability to autofocus might be dirt on
either the mirror or the CCD. However, the way the SS4000 works, the
stage moves to focus the image, not the lens. As I recall, the CCD does
face down, but the mirror is semi-upright.
check out this discussion:
There is some discussion of how to open the case, and a bit about the
layout.
Art
robg@wordweb.com wrote:
> Arthur Entlich <artistic-1@shaw.ca> wrote:
>
>>Not having lived to talk about it ;-)
>>Are you getting halos around bright areas?
>>Why do you think it needs cleaning?
>
>
> Because I had the case open to blow dust out of the stupid carrier sensor
> and had a look through to the CCD - or perhaps the mirror. I'm not au fait
> enough with the guts of the unit to know whether what I was seeing was the
> mirror or the CCD. If the former, the design is slightly smarter than it
> looked because it would mean that the CCD wasn't facing up and collecting
> dust. On the other hand, I don't know why *any* of the light detecting
> system is arranged to collect dust - including the carrier sensor and the
> mirror (if that's what I was looking at).
>
> The users were complaining that it wouldn't focus. I figure that after
> 2 years of collecting dust it probably is dirty enough to affect the autofocus
> mechanism.
>
> Johnny Johnson <jjohnso4@comcast.net> wrote:
>
>>The following was posted in January of '03 on this List by Thomas Maugham:
>
>
> Thanks for the info. I still don't like the idea of using a 1000KPa air
> stream to blow the dust off a high resolution optical device. It's more
> likely to damage it than clean it. I'm equally dubious about taking
> responsibility
> for sticking lens cleaning tissue into the unit with alcohol (which may
> affect lens coatings) or any other sort of lens cleaning fluid on it. Since
> I'm told that the ICU has plenty of money, they can pay to send it to the
> vendor for maintenance.
>
> But I do appreciate the info for future reference. :)
>
> Regards,
> Rob
>
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