Can a lens AR coating deform by heat?

AlexGT

Flashlight Enthusiast
Joined
Jan 15, 2001
Messages
3,651
Location
Houston, Texas
Hi all!

I did a E2e/Strion Bulb mod a few months back and now I notice a stain on the glass lens it looks like a water stain or the color is like oil in water (rainbow like). it has a circular patern, look at the pics. what do you think it is? Im thinking that maybe its the AR coating being affected by the heat of the bulb, but dunno.

Pics



 
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