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Cleaning stubborn particles/repair

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/18/2012 at 06:31
kingoslo View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/18/2012
Location: Norway
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Hello there,

This not really a rifle scope, but I thought the question is so similar that it is arguably useful for the audience.

I have a microscope. It has a central main objective. It seems the previous owner had an accident and sprayed some particles onto the surface of the bottom lens:





I have tried cleaning with isopropyl alcohol, acetone and a polyurethane paint solvent. It didn't help.

What is your advice?

Thank you for your time.

Kind regards,
Marius Jonsson
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/18/2012 at 11:31
bugsNbows View Drop Down
Optics Jedi Master
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bowsNbugs

Joined: March/10/2008
Location: Florida
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Points: 9294
Wow, that's a tough one. I can think of various solvents to try (such as MEK...Methyl Ethyl Ketone) , but have NO idea how they may affect the glass or coatings. I guess I'd contact the manufacturer of the microscope for their advice. What a shame to have to deal with that mess. Good luck. Whatever
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/18/2012 at 11:55
supertool73 View Drop Down
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Superstool

Joined: January/03/2008
Location: Utah
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It looks like what ever they sprayed on to it ate into the coatings to me.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/18/2012 at 12:36
Bitterroot Bulls View Drop Down
Optics Master Extraordinaire
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Joined: May/07/2009
Location: Montana
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This is a lost cause, I believe.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/19/2012 at 12:53
Horsemany View Drop Down
Optics Journeyman
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Joined: February/28/2008
Location: Nebraska
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Plastic lens deteriorated by something caustic mebbe?  Definately looks like it's toast.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/19/2012 at 17:22
jonoMT View Drop Down
Optics Master Extraordinaire
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Joined: November/13/2008
Location: Montana
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If acetone won't clean it, anything that might will probably etch the glass/coatings. Any idea what the substance was?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/19/2012 at 17:31
stickbow46 View Drop Down
Optics Master Extraordinaire
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Joined: January/07/2009
Location: Benton, Pa
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The guy who would probably know is Ilya,maybe he'll chime in!
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