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  #41  
Old 04-05-2013, 10:14 AM
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Im kinda surprised the cheapo dot sight companies don't jump on this. Seriously, we shooters HATE batteries. Well, at least I do. I <3 my Trijicon optics.
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  #42  
Old 04-05-2013, 10:29 AM
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See if they will sample !!

http://www.fiberoptics4sale.com/

Or for $4 you could do everybodies red dots..

http://www.scientificsonline.com/fib...ight-wand.html

<I'm kinda kidding, not sure if this would work or not>
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  #43  
Old 04-05-2013, 10:50 AM
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Found fiber optic strands at pretty decent prices here:

http://www.fiberopticproducts.com/Archery.htm

Ordered some of the super thin .010 stuff in red and green. Doing some research, I read that you want a bend radius no smaller than 15X the diameter of the fiber, otherwise light will not transmit as efficiently through the strand. The thin stuff should bend into a little over 1/8" without too much difficulty.

Anybody have any experience pulling apart an Aimpoint T-1 clone? Found one on Dealxtreme for $24.00. Should be a winner, LOL.
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  #44  
Old 04-05-2013, 10:54 AM
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Originally Posted by orangeusa View Post
Or for $4 you could do everybodies red dots..

http://www.scientificsonline.com/fib...ight-wand.html

<I'm kinda kidding, not sure if this would work or not>
The fiber need to be the color of the dot -- the cheapo light wands use clear plastic fiber (pretty large if I remember correctly) and get the color with a little plastic filter inside of the flashlight head. (or colored LEDs nowadays)
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  #45  
Old 04-05-2013, 1:07 PM
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Originally Posted by SilentPea View Post
The fiber need to be the color of the dot -- the cheapo light wands use clear plastic fiber (pretty large if I remember correctly) and get the color with a little plastic filter inside of the flashlight head. (or colored LEDs nowadays)
This is correct. The reflective coating on the mirror is specific to a particular frequency of light. Usually around 680 nanometers for a red dot.
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  #46  
Old 04-11-2013, 8:36 AM
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Okay, so I've done some experimenting with this stuff now and have a few observations to pass on. I installed a length of the .019 strand into a Vector Optics red dot I had sitting around (Still waiting on the Micro clone from Dealxtreme). Taking apart the Vecor optics sight, I couldn't help but notice how simple these type of sights are. I had assumed that there was a lot more going on inside of this type of sight. There are a handful of internal components inside, and field stripping one is actually pretty easy.

The fiber is in some ways both easier and harder to work with than I though. As far as prepping the ends and getting a donut type reticle, it's pretty easy to do. Bending the strands though is kind of a nightmare. Despite being relatively thin, the strands do not bend or flex as easily as the same thickness of monofilament fishing line would. They are a bit brittle actually. I've noticed that if you bend it to a certain point, the internal structure of the fiber will crack, creating a visable bright spot where the fracture is. I can assume that this reduces the ability of the strand to conduct light once a fracture like that happens. In the process of installing mine, I managed to put at least 3 or 4 fractures into the fiber. The dot ends up being a bit dimmer due to this, but should still be okay for use outdoors in well lit areas.

Also, bending the fiber with heat from a lighter is problematic at best. I think holding the strand close to a lower temp heat source like a soldering iron might be a better method, althogh I haven't tried that yet. The heat from a lighter, even at 4 or 5 inches away is enough to very suddenly melt the strand. what was meant as a gradual bend becomes more of a "Z" kink. It's a pretty frustrating process. So for those of you wanting to try this, make sure to get plenty of extra fiber to mess with, and experiment with forming and bending it prior to epoxying anything in place. Like I did.

I'll try to get some pics up later of what I've done so far. If nothing else, it's a good learning experience that I can put to use on the next one.
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  #47  
Old 04-11-2013, 5:25 PM
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Pics!

Taken down for surgery:


Reflector tube with fiber optic strand:


Assembled (Still need to figure out what to do with the excess fiber...):


Indoors with flashlight assist:


Indoors without flashlight (broken fiber not helping here...):


Outdoors in sunlight:



Definitely learned a lot that can be applied towards the next one. I got some thinner fiber in the mail today, the .010 stuff with is extremely thin and flexible, yet still really bright. Did some research on bending as well, it seems that either a hair dryer or near boiling water are the best methods for making permanent bends in this stuff without kinking it.
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