ORIGINAL: Pah co chu puk
So if I am reading that other thread correctly, you put the flash LED behind the IR LED and used the pen body as a crude fiber optic to bring the flash around the IR LED. <div></div><div>I was planning to put the IR behind the flash but I like your way better. I also like the fiber optic link that was posted in that thread, saved it to favorites. </div><div></div><div>Will the IR follow the fiber optic or is it only good for the flash? I ask because I am also thinking that a light box mounted to the upper hull with fiber optics for both flash and IR down the gun tube would be an option. If not then a light box for just the flash might work with the IR in the gun tube.</div><div></div><div>The truth is that I don't know what I am doing, it is all just an experiment.</div><div></div><div>With fiber optics and a light box I could also make the machine gun at the loaders hatch fire... I think.</div>
Your summary in the first sentence sounds about right to me.
Well a quick search seems to confirm that IR signal will travel through fibre optic cable, & I found this very interesting, 940nm IRLED ...
Fibre Optic Infrared LED 
I know very little about fibre optic cabling, but besides sizes, I'm assuming there are going to be various types & qualities of them available, so which would be the best for testing this scenario is beyond my scope.
Will it work to use several smaller diameter optic cables to carry the IR, how would that affect the final output of the signal, if any?
Is it better to go with one larger diameter fibre optic cable to carry the IR signal, then wrap it with many smaller ones carrying the flash?
So many options, so many questions, so little knowledge ....
I think your idea of experimenting with a light box, using fibre optics for both, is brilliant & you need to explore that for the benefit of all of us here!
