200mW Green Laser Module dealextreme

[kennieyk]

that looks like a awesome deal i might just have to pick that up !

 

[The_LED_Museum]

Re: 200mW Green Laser Pointer dealextreme

It should actually be called a "module" not a "pointer", or the CDRH might get on your case.

 

[dr_lava]

Re: 200mW Green Laser Pointer dealextreme

Now this is just getting rediculous. There's NO WAY that puts out 200mw GREEN. Note that the rating is <=200mW (manufacturer rated). so as to not guarantee 200mW output. Plus, the pics of it 'cutting' the bag, you can see when he stretches it that it's not cut through. Still waiting on someone to fonally test the '100mW' version for reality. PLEASE!

 

[pseudonomen137]

Re: 200mW Green Laser Pointer dealextreme

Now this is just getting rediculous. There's NO WAY that puts out 200mw GREEN. Note that the rating is <=200mW (manufacturer rated). so as to not guarantee 200mW output. Plus, the pics of it 'cutting' the bag, you can see when he stretches it that it's not cut through. Still waiting on someone to fonally test the '100mW' version for reality. PLEASE!

Formal test of 100mW direct from NewWish is in the works as of today. Initial results would seem to indicate you can expect ~100-150mW of true 532nm out of a '200mW' version.. assuming there is no "danger of extrapolation" (and there is!). I will post more details in the next few days as time permits.

 

[2xTrinity]

Re: 200mW Green Laser Pointer dealextreme

I have doubts about this due to the simple fact that the light is supposedly running off of AAA cells -- I find it VERY hard to believe AAA cells could supply enough current to pump a 200mW laser. I might believe it if it ran on a LiIon such as an 18650. The do have their is the 10mW, and I'd say that one is legit judging at how how bright it is compared to more expensive 5mW green lasers -- it projects a solid visible beam, even outdoors in overlit parking lots. So I would expect there to be a trend of the lower wattage DX lasers being higher output than advertized (of green), and the higher-wattage lasers outputting less than claimed.

If it turns out that the Diode is good to put out 200mW of green, but is only limited by the batteries, it may be worth someone transplaning the diode/optics into a different flashlight casing and powering it off of lithium -- if this thing puts out anywhere close to advertized specs, it will eat through batteries like crazy.

 

[allthatwhichis]

Re: 200mW Green Laser Pointer dealextreme

It should actually be called a "module" not a "pointer", or the CDRH might get on your case.

:lolsign: That's the first thing I thought when I saw the title... Congrats on the 16k posts Craig!!!

 

[liveforphysics]

Re: 200mW Green Laser Pointer dealextreme

Thanks for getting me to visit the DX site again... There goes another $1000bucks... same thing just happened last week when I visited DX.

That website is going to break me!

That plastic he tried to burn that just caused the black dye to ablate leaving the crosslinked clear polymer base is just about immune to lasers (in my own testing experience). You will find some clear sacks that they sell oranges in that have black label sections are un-burnable as well. 500mW of pinpoint focused IR on the sack, and i can ablate the black ink off in a fraction of a second with a puff of smoke, yet nothing can burn the base material because it passes the light rather than absorbing it once the black ink is vaporized.

In otherwords, IMO, that was a really dumb choice to use a plastic that is not black, but just colored black on the surface for demo-ing a laser's power.

When we were all excited about that 200mW laser "deal" from tommygreen on tradekey (turns out to just be a scamer), we determined that useing alkaline AAA cells to power a 1W 808nm pump (needed for 200mW 532nm output), that run times of around 4-6mins could be expected from such high current draws on AAA alkaline cells.

The 100mW DX units make such an increadible visible beam, if this unit turns out to just be over >100mW of 532nm, its going to be a steal at these prices.

Dr. Lava, I MIGHT be able to get to the college lab tomarrow to do some formal testing on my DX100mW units. I do have the day off, but I have a zillion other things to take care of that get priority.

Best Wishes,
-Luke

 

[Aseras]

Re: 200mW Green Laser Pointer dealextreme

it says in the aticle that it's not IR filtered so buyer beware.

i really doubt it's 200mw 532.

 

[matrixshaman]

Re: 200mW Green Laser Pointer dealextreme

DX does state: " Class 3B (update: the factory has confirmed this to be a geniune Samsung Laser Chip rated 3B)" which I believe are good up to 500 mw.

 

[Aseras]

Re: 200mW Green Laser Pointer dealextreme

3b means it's higher than 5 mw and less than 500mw. any 5mw greenie has at least a 200mw pump diode.

green laser pointer with leaking IR are notorious for aberrant laser meter readings. laser are 1 uniform coherent waveform.. only monochromatic 532nm for green. when you introduce leaking IR ( 808 pump diode or 1064 nd:yv04 ) it skews your reading. I can make a 5mw leadlight register as a 300mw+ laser by removing the ir filter on my power meter.

quality of ir filters is important too. crummy ir filter inflate laser measurements. the only real way to measure is to have a known ir filter and it's reflectivity and use that in front of your laser power meter.

example green laser http://www.repairfaq.org/sam/dpss1.gif

200mw of 808 IR goes into a nd:yv04 crystal that frequency doubles it to 1064nm. that laser light then goes into a KTP crystal that halves the laser to 532nm, and you have green.

most pointers have a hybrid crystal with the nd:yv04 and ktp fused together inside of a heatsink and then the good ones have an ir filter glued on top.

the shoddy ones don't bother with the ir filter and you get 50mw greens with 5mw of green and 30-40 mw of leaking ir.. or more.

 

[Aseras]

Re: 200mW Green Laser Pointer dealextreme

Formal test of 100mW direct from NewWish is in the works as of today. Initial results would seem to indicate you can expect ~100-150mW of true 532nm out of a '200mW' version.. assuming there is no "danger of extrapolation" (and there is!). I will post more details in the next few days as time permits.

if you can can you try and measure or find the specs on the pump diode? i might just pick one up to have a 1 watt IR laser pen.

 

[bozo]

Re: 200mW Green Laser Pointer dealextreme

I dont know about deal extreme, i bought a 100mw from them a little over 2 weeks ago and havent recieved it yet, i cant track the order and now they aren't responding to my emails, so i would think twice about ordering from them, its only a good deal if actualy recieve the laser.

 

[The_LED_Museum]

I made a slight alteration to the thread title: "Laser Module" instead of "Laser Pointer". :thumbsup:

 

[dr_lava]

I just got the ellys and Vinets that I ordered in. It only took about 1 week since they had them in stock. Inside was a slip saying they shipped what they had and the rest of my order was on the way from China. That's pretty good! Don't worry too much bozo, I know it's hard, but just wait

Livefor, I hear you about the plastic bag, and that's true, but that wasn't the only reason it can't be 200mW of green. Still, it's an excellent price even if it's only 100mW of green!

 

[liveforphysics]

Aseras- Keep in mind, with a 20mW DX green pointer I was able to get over 30mW into the laser meter AFTER going through a lab grade IR filter block. Combined IR + 532nm output measured only about 50mW combined power on a meter which is NOT confused by multi-wavelegnth readings.

Also, the very same laser barely made 5mW when cold... Warm that sucker up to body temperature, and poof! over 30mW!. Not exactly sure why that happens, as it could be so many different things, but the huge varience with temperature is kinda interesting. My AtlasNova CPF special is a similarly powered laser, yet even when skiing and its freezing cold, I push the button and it just blasts out a brilliant beam, and actually seems to get dimmer with heat, which is totally opposite of the DX unit.

Don't ask me why, cause it's over my head.

 

[Aseras]

that's sounds good....

problem is probably how the crystal set is fixed inside. some use some resin stuff that contract and expands due to thermaling.. other use diffrent lenses and hybrid crystal sets.. the more stuff between them the more likely thay are to change places with temperature.

atlas nova are leadlights that used a hybrid crystal set..

anyone taken apart a DX laser yet to see how it's setup?

I might just waste my money on one....

 

[Aseras]

Re: 200mW Green Laser Pointer dealextreme

I dont know about deal extreme, i bought a 100mw from them a little over 2 weeks ago and havent recieved it yet, i cant track the order and now they aren't responding to my emails, so i would think twice about ordering from them, its only a good deal if actualy recieve the laser.

it is a holiday over in china still keep that in mind,, i think that what the big sale on their website is about anyways...

anyways i went ahead and bought one.. i'll tell you all for sure what the outputs are. if anything since it breaks down in the middle i can use it for something else I have in mind.

 

[pseudonomen137]

Yeah, liveforphysics, the DPSS lasers will be very different depending on temperature unless you have TEC regulation (not going to happen in a cheap portable). As for 30mW green, MAYBE, but I have a feeling that's either a very rare occurrence, or something was wrong with the metering setup. My 20mW definitely wouldn't give me those ratings.

As for IR filtering, they are not well IR filtered, but they aren't completely unfiltered either. More info on that will be posted in the next few days, but I'll suffice to say that you shouldn't expect 200mW 532nm out of that laser. Also, they are VERY poor quality. The WL and CNI black/gold lasers are much better, these are cheap chinese mass-produced to save every penny possible, and the product really shows it. At the price though, its hard to complain.

As for the pump (whoever asked), I don't have a 200mW to dismantle, but if the DX lasers are manufactured by NewWish, I will try to get my contact at NewWish to provide pump diode specs. Its hard to get the setup recollimated though if you're trying to use it as an IR laser. Maybe better to either start from scratch from a diode, or pay the extra price to get a already manufactured one (PM for details if needed).

 

[Hemlock Mike]

Well the race is on -- I took another chance with DX and ordered one tonight too. Who gets one first ?? (won't be me !!)
Mike

 

[Aseras]

did you ever get your first one HM?