[HUG ] Re: Cleaning the Mirror

Cool! It's official. HB sanctions cleaning your own mirror. Evidently they beefed-up the mirror so it could take a licking and keep on ticking... 

:-)

Jim


On Feb 19, 2008, at 11:41 AM, Bob Adler wrote:
Just got off the phone after speaking directly with HB NJ. Paul stated that putting a couple of drops of Kodak lens cleaner (or ROR - I confirmed that was OK with him) on a few sheets of crumpled Kodak lens tissue and genlty "dabbing" it on the mirror to loosen any grime, and repeating that process several times ("gently" being the key word) would be fine. When I expressed concern about how delicate the surface of the mirror was because it was surface mounted silver, he stated he wasn't sure of the accuracy of that statement. He said the mirror was under coated and not as delicate as I was describing. Paul also stated that removing the prism/focusing screen and lens allows one to clean the mirror from either opening. 
So that's the word from HB NJ, for what it's worth...
boB

BOB KISS <bobkiss@xxxxxxxxxxxxx> wrote:
DEAR LIST,
I forward the following from my former professor of graduate optics
at RIT, John Carson, in reply to my sending him the collodion method I use 
to clean SLR mirrors.
CHEERS!
BOB



-----Original Message-----
From: j c [mailto:biswel_753@xxxxxxxxxxx]
Sent: Tuesday, February 19, 2008 10:56 AM
To: BOB KISS
Subject: RE: [HUG ] Cleaning the Mirror


Bob,
I've never had to clean an SLR mirror but did clean a diffraction grating from a monochromator using exactly the method you suggest, pure collodion. I think this method is traceable to a technician from Beckman Instruments who serviced their spectrophotometers. I'd probably recommend carefully checking what materials are adjacent to the mirror. The collodion contains ether and that might cause problems. Do not forget that the flash point of collodion is quite low, so no sparks or open flame in the vicinity. That 
means NO SMOKING!
There's also the method of lightly dragging moistened lens cleaning tissue gently over the surface. This is great for mounted lenses where collodion might possibly wreak havoc with the lens mount blackening and markings. I've used it with success for that purpose. This method might be traceable to an old Perkin-Elmer bulletin that dealt with laser resonator mirrors, I 
think. (Been a long time...)
The answer you really wanted is that your advice was OK; just hope that its 
recipient is not a total screw-up.

John
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = ====================================================================== To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there. 




Bob Adler
Palo Alto, CA
http://www.raflexions.com

Other related posts: