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Re: [OM] Cleaning Mirror in film scanner

Subject: Re: [OM] Cleaning Mirror in film scanner
From: "Sue Pearce" <bs.pearce@xxxxxxx>
Date: Mon, 6 Apr 2009 11:04:59 -0500
Are geese safe in your neighborhood? I have a vision of a monty Python-like 
scene where you are stalking the elusive goose.

Bill Pearce
----- Original Message ----- 
From: "John Hermanson" <omtech1@xxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, April 06, 2009 9:29 AM
Subject: Re: [OM] Cleaning Mirror in film scanner


> 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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