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Looking for a laser that can burn white paper at 10 feet

Marco Polo

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My 500mW 405 reliably burned 1 to 2mm holes in a sheet of white paper at ~11 feet when focused to infinity. So, I guess you'd want something like that.
 

WizardG

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For burning at 10' a single mode laser will almost certainly be better than most 445s. A really good 405 should be just the ticket. You can do it with a beast of a 445 (think 9mm diode) but the beam specs on those multimode diodes are relatively poor so much more power will be needed making CR123 batteries impractical.
 

Bionic-Badger

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Short answer: doesn't exist. I'd start setting lower expectations.

Remember that the visible lasers that you see on this forum are really considered low-powered lasers. Even those 2W 445nm lasers are pretty low powered as far as burning is concerned.

I think I Frothy Chimp show off a Q-switched Nd:YAG green laser that could probably do what you asked, but it's way out of your price range, is not portable, and certainly wouldn't use primes.
 

zkanker

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Well, pinholes in white paper at 10 feet as mentioned above is what I'm looking for, albeit, it appears that model (If the one I found was the same model) does not use the 123 primary batteries I'd prefer.
 

Shakenawake

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I've got Blord making me a 500mW 405nm laser right now. sounds like it could be quite the burner. I believe it uses 16340 batteries, and cr123 could likely power it too, but 16304 are 3.7 volts and cr123 are 3 volts, so it wouldn't be full power on the cr123s
 
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Short answer: doesn't exist. I'd start setting lower expectations.
Sorry BB but I have one here right now and I just took pictures of it doing just that, burning a hole through
off white printed on printer paper at 10 feet measured :D










And the end result @10 feet measured.


You can see the paper is not pure white as it had some printing on it which made it easier to heat.
 
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Shakenawake

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Hey pyro, we're talking pure white here, but I am curious how many watts of 445 you have there. looks like at least 2. I tried this experiment the other night, as I just got my new lenses from rayfoss, and my rifle fails on pure white, at ten feet, focused to infinity. granted these are the three layer lenses on 1.5 watt, I am guessing you have a g2 on there pyro?
 




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