Custom,corrected,NUBM08,Blackbuck,Adjustable,6w

That looks like what I get with the 6X in my backyard without a BE, just the G2 and 6X.

I think because the 12X is starting wider the divergence number is better over the range, but as for usefulness I think the 6X may be better, but I could be wrong.

Well considering at 65 feet before the lens pair correction the fast axis was over a foot wide and looked something like this with just a G2 lens.....



And it didn't stand a chance of burning anything at that range and shot up in the night sky it more closely resembled a hand fan than a beam.......

But after the correction it took all of that line and put it all in a spot only this big !





But actually I have a setup for both 12X and 6X I can change between in a few seconds.....

With the 6X and I seem to do better with a sanwu G2 even though the DTR G2 is cleaner, but getting the 6X corrected beam from a 44 with G2 primary into a sanwu 3X BE is really sweet, you can concentrate that energy into a small spot at 15 feet that will pop out flame kernels on wood and will ignite paper bags at 75 feet after 10-20 seconds.

Its a matter of getting that energy into a small spot at a longer range, next comes increasing the energy and or decreasing the spot size.

I like a compact build, but I am very tempted to build a CO2 for the beam quality and higher power, actually I have some very cool ideas but the cost goes up a lot.

It's a shame that the pretty and bright beams become a liability with neighbors but I don't want to alarm anyone, I do however want to be able to incinerate by way of a focused line of energy a slice through a live 1/2 inch branch on my own property and safely of course.

I am afraid that a pair of combined blue 7W diodes won't cut it without some fantastic optics and even then it's going to require a brace and possibly optics just to see the focus, I think more power is the way to go, but I don't want to frighten anyone, just burn through a little bush branch.

I think I am going to build a CO2 leaf burner next and use it safely on my own property. I think we have reached the limits of the blue laser diode within reason.

Just imagine a sweet sun color yellow laser that is as tight as it is round that could slice through a 1/2 inch branch at a 150 feet and it fits in the palm of your hand !

Are CO2 lasers visible ?

RedCowboy said:

With the 6X and I seem to do better with a sanwu G2 even though the DTR G2 is cleaner, but getting the 6X corrected beam from a 44 with G2 primary into a sanwu 3X BE is really sweet, you can concentrate that energy into a small spot at 15 feet that will pop out flame kernels on wood and will ignite paper bags at 75 feet after 10-20 seconds.

Its a matter of getting that energy into a small spot at a longer range, next comes increasing the energy and or decreasing the spot size.

I like a compact build, but I am very tempted to build a CO2 for the beam quality and higher power, actually I have some very cool ideas but the cost goes up a lot.

It's a shame that the pretty and bright beams become a liability with neighbors but I don't want to alarm anyone, I do however want to be able to incinerate by way of a focused line of energy a slice through a live 1/2 inch branch on my own property and safely of course.

I am afraid that a pair of combined blue 7W diodes won't cut it without some fantastic optics and even then it's going to require a brace and possibly optics just to see the focus, I think more power is the way to go, but I don't want to frighten anyone, just burn through a little bush branch.

I think I am going to build a CO2 leaf burner next and use it safely on my own property. I think we have reached the limits of the blue laser diode within reason.

Click to expand...

No the electro magnetic spectrum that's visible to the human eye is basically 375nm through 700nm ish, you can see a slight pink/red tint in 808nm, that's why night vision illumination for home security went to 915nm so the illumination would not be visible.

At 1550nm the wave no longer penetrates the eyes lens, well not unless it's enough energy to burn flesh, but a diffuse reflection is said to be eye safe and C02 is 10400nm and often expressed in the next range of 10 as um, so a 10.4um laser is 10400nm, the length of the wave, hence a 405nm has more waves per inch than 660nm, that's why blue ray players have more bandwidth and fiber optics carry more digitized information than a copper pair of telephone wires, typically I think the telephone stuff is 1550nm to be "eye safe" but I could be wrong.

Now X ray lasers are bad ass and can fry an enemy troop behind a wall, gamma ray lasers if we can make them work without destroying themselves may well shoot through the earth.

VLF very low frequency is used to communicate with submarines underwater but the bandwidth sucks and there is something new now.

The really dangerous near IR wavelengths are the invisible waves that DO easily pass through the eyes lens onto the retina in the 800 to 1500 range or there about, you have to be very careful messing with that or you could go blind before you know there has been a mistake, it's also what the Chinese mount on their main battle tanks to blind enemy troops, pretty messed up but be aware that you want wrap around goggles if you are going to work with anything in the near IR range, I prefer not to at all, it's too risky to others to use outside your house even if you have wrap around goggles. 10400 should not hurt anyone's eyes from a diffuse reflection but wearing polycarbonate basic clear goggles are a good idea if working with it up close, and as the beam quality is good the other main concern is knowing your backstop, you don't want to zap a hanging leaf and set your neighbors curtains on fire.

I'll def be getting a sanwu 3X BE but I'm still looking at the wicked lasers BE too but of course it has different threads from all the other BE, This is from Wicked Lasers Support "The diameter and pitch for the threading is 1.082" x .035" I also asked what the input aperture size was but I don't think they understood what I was asking "M9X0.5" That seems more like a metric thread size then the input aperture size ?

M9 x 0.5 is the size and thread pitch of our 3 element and G2 lens barrel, 9mm with 0.5 thread pitch.



DTR has the NUBM44 diodes on sale, I just bought another, it's always good to have a 2nd build ready to go, while 1 is cooling down you can go to the backup, it's also fun to hold one in each hand and double your power at the target, and do comparative testing on optics, ect....

Does anyone have any discount codes for sanwu ???