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ArcticMyst Security by Avery

First test on a DIY 40W CO2 laser






Bluefan

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He didn't make his tools from scratch :)

What I mean is that if you have something that emits coherent light when you hook up a power supply you already have a laser. Of course going from there to a practical unit for normal use is another step, so I'm not saying what Arayan did wasn't nice work. It's just that I think a true DIY laser starts out without something that already can lase, but it's a matter of definitions which aren't important anyway.
 
Arayan

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Bluefan said:
He didn't make his tools from scratch :)

What I mean is that if you have something that emits coherent light when you hook up a power supply you already have a laser. Of course going from there to a practical unit for normal use is another step, so I'm not saying what Arayan did wasn't nice work. It's just that I think a true DIY laser starts out without something that already can lase, but it's a matter of definitions which aren't important anyway.
Click to expand...

I know, I know... you also gave me rep points (thanks) :)

In my opinion would better distinguish DIY "tools" from real DIY "tools" :D as my CO2 laser and CO2 laser by Jarrod, or common DIY 445 laser pointers (with commercial hosts) versus those built by AnselmoFanZero :na:
 
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Arayan

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someone could advise me about the best diameter and focal length of the lens for this kind of tube?
:thanks:
 
DashApple

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I use a 7" FL , 1" Diamiter ZnSe Lens ofr expreimenting , on ebay they show up sometimes , shorter FL is good but then burning things gets to close to the lense and thats not fun for the lens , but any lens bigger than beam diamiter from laser engravers or something made of ZnSe will work great , ZnSe 10.6um coated lens with FL 5 - 8" should be fairly easy to find on ebay or engraver shops .

Hope This Helps
 
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Arayan

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ionlaser555 said:
I use a 7" FL , 1" Diamiter ZnSe Lens ofr expreimenting , on ebay they show up sometimes , shorter FL is good but then burning things gets to close to the lense and thats not fun for the lens , but any lens bigger than beam diamiter from laser engravers or something made of ZnSe will work great , ZnSe 10.6um coated lens with FL 5 - 8" should be fairly easy to find on ebay or engraver shops .

Hope This Helps
Click to expand...

Thanks for the help :) I found this 20mm ZnSe Focus Lens CO2 Laser Engraving 50.8mm focal | eBay that seems good also in price...
 
Cyparagon

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Yes, but the target will only be 2 inches from the lens. The plume of flame can easily reach beyond 2 inches. You'll need something to blow the flame and debris away as it is created unless you want to replace the lens every few shots.
 
Arayan

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Cyparagon said:
Yes, but the target will only be 2 inches from the lens. The plume of flame can easily reach beyond 2 inches. You'll need something to blow the flame and debris away as it is created unless you want to replace the lens every few shots.
Click to expand...

Thanks Cyparagon, but the maximum that I can find on ebay is a lens with a focal length of 63.5 mm, not much more... :(
 
Cyparagon

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laser research optics has a 0.6" diameter 5"FL for $75 and a 0.75" diameter 7.5"FL for $90. I bought the latter from them a few years ago.

Or you could just use a fan. Either way :beer:
 
realista

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hi biys.... i've seen this LASER BEAST by person some day ago.
arayan is a very intelligent boy he explained me how he build it..... and yes... it smokes EVERYTHING within 0.1 second.....
 
X

xxmatt72094xx

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So I've heard of a CO2 laser.. But I'm curious.. what exactly is it?
How does it work?

That thing up there looks straight from a horror movie or something.

I like it.

I figured I'd ask the forums, rather than google, because you would tell me what I need to know
 
icecruncher

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Reminds me of the joke about God vs the athiest. God says according to the bible, he made man from the dust of the ground in 6 days.

The athiest says he can do the same thing without God's help and begans to gather some basic chemicals and elements from the soil around him, putting them together in the correct order to create the basic building blocks of nature.

God stops him while he is gathering these things and tells him he is cheating.

The athiest asks what he means.

God replies, "Get your own dirt".




Bluefan said:
I don't consider laser diodes true DIY lasers either. The complete laser is already neat in a package, hook up the power source and you have coherent light.

Off course a DIY laser comes in many degrees, 1)putting a laser diode in a suitable host is a bit of DIY, 2) hooking up a laser tube to the power supply and making it's casing and cooling is more DIY, 3) making a laser from bare components like a dpss from the diode, yag crystal and mirrors is even better and 4) totally from scratch is awesome. The N2 laser would be in the last category and as far as I know the easiest from scratch laser.

My first attempt didn't lase, but I do plan to try again some time. What lordjet describes it really building something from scratch. Very few people even try that, but I hope that I can do something more than a N2 laser in the future. I recently started building a good vacuum system, so I'm slowly getting there.
Click to expand...
 
paulzimm

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Hello, where did you get the 40 watt tube from and how much did you pay? I remember a site a while ago that had huge 80 watt tubes for just a few hundred dollars.
 
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