Yes, usually the internal shape is designed for minimize te possible reflection to the output, or at least, for make the beams bounce so much in the inside, before become reflected again to the output, that the more possible energy is adsorbed from the black matte surface and converted in heat ..... like in this way:
Considering that the internal surface is usually sandblasted and then anodized opaque, it can have an absorption capacity of 95% or more, and that a beam correctly pointed can bounce inside 6 to 9 times, before re-bounce to the exit .....
As example, considering a 10W beam that bounce also just 4 times, loosing 95% of its energy in each bounce ..... 10-95%=0.5 > 0.5-95%=0.025 > 0.025-95%=0.00125 > 0.00125-95%=0.0000625 ..... when it come out again, it's a halo of 6.25 microwatt (a halo, not a beam, cause the inside surfaces are matte, not speculars) ..... safe enough, imho
I didn't think about sand blasting. I thought it was a different kind of coating inside. Maybe I'll go touch it
Peace,
dave
I didn't think about sand blasting. I thought it was a different kind of coating inside. Maybe I'll go touch it
Peace,
dave
A leftover from my days in construction, I think. I'll try to remember to touch it when I get home later today. Mine has been hit with 600mW of green, 1W of violet, and 800mw of IR without any problems.
I never got around to actually touching it. I'm pretty good about not touching where my fingers don't belong so it slipped my mind
Peace,
dave
Hmmmm... gonna need to try that...
The only problem I can see is inadvertently cutting yourself..
Maybe install them in a shroud..
Jerry
