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Re: [OM] Cleaning Mirror in film scanner

Subject: Re: [OM] Cleaning Mirror in film scanner
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Mon, 06 Apr 2009 10:29:56 -0400
Yes, goose feather is my favorite tool for cleaning focus screens. I bet 
also safe for mirrors.
___________________________________
John Hermanson  |   CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121  |  www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html


Chuck Norcutt wrote:
> Sorry, I can't help you with the sensor alignment.  But I wouldn't worry 
> about cleaning the mirror any more than cleaning a lens.  You might try 
> stroking it lightly with a small piece of Swiffer Duster if you have 
> some.  If you don't have any or that doesn't do it completely then I 
> would swab it gently with a cotton swab and lens cleaner, alcohol or 
> what have you.  Do it multiple times using a clean swab each time.
> 
> Modern first surface mirrors are tougher than most people realize.  They 
> are aluminized in a vacuum chamber by sputtering aluminum vapor onto the 
> surface to form a thin coating.  As soon as the aluminum is exposed to 
> air the surface oxidizes to form a microscopically thin coating of 
> aluminum oxide.  You might recognize aluminum oxide as the stuff that 
> grinding wheels are made of.  So, while in an extremely thin layer, it's 
> also very hard.  It should easily stand up to any cleaning solution you 
> might reasonably use on any other bit of optics.
> 
> I think John Hermanson has spoken here of using bird feathers as a 
> sweep.  But I have none such.  :-)
> 
> Chuck Norcutt
> 
> 
> Doug wrote:
>> I took my Polaroid sprintscan 4000 partially apart to clean the mirror in 
>> it. 
>> The question I have is how do I clean the mirror. It's dustier than I can 
>> just blow off and I don't want to blow the dust deeper into the scanner. The 
>> mirror appears to be a first surface mirror and I don't know what solvents I 
>> can use without damaging the metal. 
>>
>> I also took what I believe to be the sensor off by mistake. Any opinions on 
>> realigning it. 
>> -Doug
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