RE: [ATM] Testing of polished surface

[GREILING Yan <yan.greiling@eurocontrol.int>]

I put the flashlight behind the mirror and I look at the surface with a
loupe. Doing so, you cannot miss every single pit.
The mirror I can currently working on is perfectly polished out, even so,
the red laser pointer still shows what you describe. I don't think it is a
meaningfull test.
Happy figuring

Yan

-----Original Message-----
From: Chris Plicht [mailto:cap@plicht.de]
Sent: Sunday, June 06, 2004 7:26 PM
To: atm@atmlist.net
Subject: [ATM] Testing of polished surface


Dear list,

it is still hard for me to decide if a mirror surface is polished enough 
or not. I test it with a strong light and a loupe and look for those 
star like reflections. My current project looks good, but when testing 
with a red laser pointer tiny spots still stand out and sparkle like a 
star field in the Milky Way.

 Any suggestions as to when call a surface polished?

Chris (ready to work some more hours)

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