kramer5150
Flashaholic
Curious... if the back side of a TIR optic (the conical shaped side) gets dirty, dusty or fingerprint-smudged does it decrease the optical efficiency of the lens?
Dusty TIR optic?
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DimeRazorback
Flashlight Enthusiast
One wouldn't think so, considering it is the rear.
That is a very good question though! :thinking:
That is a very good question though! :thinking:
computernut
Enlightened
If a TIR optic works like a fiber-optic cable, it doesn't matter what's on the outside of the material as the light is trapped inside (refraction).
Th232
Flashlight Enthusiast
Quite possibly. You're replacing the plastic-air interface with a plastic-grease/dust/whatever interface, so the angle for total internal reflection to occur would change. For better or worse I'm not too sure, but I suspect it'd be worse.
