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Old 12-03-2007, 02:14 PM #1
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Default Hello!!

I am Chris from sweden
just bought a 30mW laser for 50$ from a guy a worlds biggest LAN party here in sweden, Dreamhack, so cool
the guy that sold it to me said that I was able to open it up and crank it up to 50mW, but i just cant get the thing open!!! any ideas? it looks just like this one: Powershot 50mW

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Old 12-03-2007, 09:08 PM #2
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Default Re: Hello!!

Welcome to the forum! Thats a newwish laser, you can get them from www.dealextreme.comaswell. just search around the forum on how to open it up, but basically the silver end cap is press fitted in.
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Old 12-04-2007, 01:46 AM #3
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Default Re: Hello!!

Welcome to the forum!
First off... Newwish lasers are notorious for their lack of IR filters. Green lasers, to put it VERY simply, use an IR diode (80nm) which pumps 2 chemically doped crystals to change the wavelength to 532nm. (green) (Anyone else care to post the full names of the crystals? I can only remember the abbreviations. :-[ ) However, the crystals are quite inefficient, and leave a large amount of residual IR. Filters are usually employed to drastically reduce the amount of IR, but with the lack of a filter, you're probably getting a good 100mWs MINIMUM of IR just bouncing around. Radiation is still radiation, whether it's invisible or not... and IR is particularly harmful.

Of you want a GOOD laser, I suggest www.novalasers.com. Steer clear of Wicked Lasers, Tech Lasers, and Dragon Lasers.
Have fun, and safe lasering!
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Old 12-04-2007, 01:51 AM #4
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Default Re: Hello!!

Quote:
Originally Posted by mr_munchies
(Anyone else care to post the full names of the crystals? I can only remember the abbreviations. :-[ )
Nd:YVO4: Neodymium doped Yttrium Ortovanadate - Halves frequency from 808nm to 1064nm.
KTP: Potassium Titanyl Phosphate - Doubles frequency from 1064 to 532nm.

IR filter - Blocks the residual 808nm and 1064nm.

Oh, by the way, NewWish lasers do have IR filters, but they still leak a large amount of IR compared to other lasers.
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Old 12-04-2007, 07:46 AM #5
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Default Re: Hello!!

Steer clear of Techlasers, their prices are cheaper than Laserglow, but the only way it could be cheaper is the fact that they are just fake copies, like fake rolexs
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Old 12-04-2007, 10:30 AM #6
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Default Re: Hello!!

Quote:
Originally Posted by King K
[quote author=mr_munchies link=1196694870/0#2 date=1196736389](Anyone else care to post the full names of the crystals? I can only remember the abbreviations. :-[ )
Nd:YVO4: Neodymium doped Yttrium Ortovanadate - Halves frequency from 808nm to 1064nm.
KTP: Potassium Titanyl Phosphate - Doubles frequency from 1064 to 532nm.

IR filter - Blocks the residual 808nm and 1064nm.

Oh, by the way, NewWish lasers do have IR filters, but they still leak a large amount of IR compared to other lasers.[/quote]

It's Yttrium OrtHovanadate... and it doesn't halve the frequency. It doesn't act at all like a frequency doubler crystal, more like a diode pumped 1064nm laser, as it simply absorbs the 808nm then lases at 1064nm itself, like in a pulsed rod laser.
or something like that.

welcome! what was dreamhack like, ive always wanted to go to that :P
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Old 12-04-2007, 07:45 PM #7
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Default Re: Hello!!

Quote:
Originally Posted by BlueFusion
It's Yttrium OrtHovanadate... and it doesn't halve the frequency. It doesn't act at all like a frequency doubler crystal, more like a diode pumped 1064nm laser, as it simply absorbs the 808nm then lases at 1064nm itself, like in a pulsed rod laser.
or something like that.
Oh yeah, my mistake, it's orthovanadate, and yeah, the only thing I knew about the Nd:YVO4 is that it lases at 1064nm on green lasers and 1342nm/1064nm on yellow lasers.
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Old 12-04-2007, 07:48 PM #8
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Default Re: Hello!!

i know that wicked and dragon are overpriced, but what else is wrong with their lasers?
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Old 12-04-2007, 07:50 PM #9
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Default Re: Hello!!

hey to get the dx lasers open to mod it you have to drill a hole aprox. 3-4mm above the lasers button and take a peek inside with a flashlight and you should see a small pot screw there really is no other way to open those babys up unless you want to wreck it
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Old 12-04-2007, 07:52 PM #10
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Default Re: Hello!!

yeah if u try to take it apart, u will break the seal and wreck it
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Old 12-05-2007, 04:39 AM #11
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Default Re: Hello!!

Nope ! Well, you may wreck the "seal" but you can safely take them apart, mod them, and put them back together again. Or take them apart, fix them, and put them back together again...whichever way floats your boat :-) To get them apart, use Hemlock Mike's almost patented method of using a wooden block to get the case open. Now that I have given you the key words to searc with, have at it, and learn how to safely tear into your DX laser !
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Old 12-05-2007, 04:48 AM #12
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Default Re: Hello!!

The top silver part, with a lot of force, comes right off. You don't wreck anything - just stick it back in later. You'll need something that will grip the top without damaging it though to pull it out.

What you're describing with upping the power is a pot mod and is a bad idea. You push the components past their threshold, like overclocking, but the components in a NewWish laser barely, if even, handle their output to begin with. Therefore, changing the pot will shorten the lifetime many times over (or you may just instantly kill it) with little more than a few mW to gain. High risk, low reward - a gamble I'd avoid if I were you.
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