Hey guy here i'm new to this forum. I'm going to buy a green 30mW green laser at the local store. Just want to ask if there are any simple method to identify 30mW from 5mW Green laser cos i don't want to be cheated by bad guy. (i'm absolutly a newbie :-/)
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How to identify 30mW from 5mW Green laser ?
- Thread starter ishareman
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hmmm without a meter its hard to really tell :-/
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well a 30 mw may pop a black balloon 
but it may not i would try that
oh what are you paying for it not more than 40.00 usd I hope unless its a really good brand
as to actually feeling it naw it usually takes 50-70 mw plus before you feel it
but it may not i would try that oh what are you paying for it not more than 40.00 usd I hope unless its a really good brand
as to actually feeling it naw it usually takes 50-70 mw plus before you feel it
john lawson said:well a 30 mw may pop a black balloon
oh what are you paying for it not more than 40.00 usd I hope unless its a really good brand
as to actually feeling it naw it usually takes 50-70 mw plus before you feel it
no i'm getting it for a extremly terrible wholesale price that's why i'm now worrying
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ishareman said:[quote author=john lawson link=1233924107/0#3 date=1233924856]well a 30 mw may pop a black balloon
oh what are you paying for it not more than 40.00 usd I hope unless its a really good brand
as to actually feeling it naw it usually takes 50-70 mw plus before you feel it
no i'm getting it for a extremly terrible wholesale price that's why i'm now worrying
[/quote]
Buy THIS
http://www.ledshoppe.com/Product/ledp/LP1075.htm
D
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If you are going for your first green laser, you can't go wrong with the true DX 30mW. Also chek other dealextreme products, depending on what your money ammount is I would go for the true 30mW or the true 50mW if you want a green laser and for the 200mW burner (red) for 41.50$.
http://www.dealextreme.com/details.dx/sku.469 <--30 green
http://www.dealextreme.com/details.dx/sku.1371 <--50 green
http://www.dealextreme.com/details.dx/sku.11315 <--200 red
Green for outside fun, red for inside fun (bruning oh yes).
About distinguishing from 5mW to 30mW it's really hard, the only thing coming to my mind is testing the burning. Take a Scotch piece of tape, extend it as much as you can without broking it while covering the laser output. turn it on and w8, my true 30mW will make a hole on it in one or two seconds. 5mW is not suposed to burn nothing.
Also note that usually 5mW greenies are made just to pass the US regulation, and so they are kinda overpowered, if you dont want to be cheated just buy the one I said you from dealextreme.
http://www.dealextreme.com/details.dx/sku.469 <--30 green
http://www.dealextreme.com/details.dx/sku.1371 <--50 green
http://www.dealextreme.com/details.dx/sku.11315 <--200 red
Green for outside fun, red for inside fun (bruning oh yes
).About distinguishing from 5mW to 30mW it's really hard, the only thing coming to my mind is testing the burning. Take a Scotch piece of tape, extend it as much as you can without broking it while covering the laser output. turn it on and w8, my true 30mW will make a hole on it in one or two seconds. 5mW is not suposed to burn nothing.
Also note that usually 5mW greenies are made just to pass the US regulation, and so they are kinda overpowered, if you dont want to be cheated just buy the one I said you from dealextreme.
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hmm... see if you can acquire a bead type NTC thermistor and mount it on something that allows it to stand like wood or something not thermally conductive, now color it black to ensure none of the infrared output gets deflected.
Connect it to your multimeter to it and measure the varying resistance, if you can log it please log it, draw a chart per laser. You would first need to get a laser you know thats 5mw, record a table of temperature rise per unit time and compare your two questionable laser's graphs to that graph, if the graph increments dramatically more than the known 5mw you could speculate it has more power output.
It'll be a very general observation since you could argue that the 30mw may have an IR filter where the 5mw did not...yadda yadda and so on...but I'm out of ideas and this is the best I can come up with :-/
Connect it to your multimeter to it and measure the varying resistance, if you can log it please log it, draw a chart per laser. You would first need to get a laser you know thats 5mw, record a table of temperature rise per unit time and compare your two questionable laser's graphs to that graph, if the graph increments dramatically more than the known 5mw you could speculate it has more power output.
It'll be a very general observation since you could argue that the 30mw may have an IR filter where the 5mw did not...yadda yadda and so on...but I'm out of ideas and this is the best I can come up with :-/
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ishareman said:
Yeah... you could get one of these..... :
http://www.bauer-electron.com/eby/ebayhlpm.htm
Jerry
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The "true" are likely to be slightly higher power. No promises though, we're talking chinese milli-watts.
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Cyparagon said:
I like that one.... "Chinese MilliWatts"..... ;D ;D ;D ;D
Jerry
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lasersbee said:
Yeah... you could get one of these..... :
http://www.bauer-electron.com/eby/ebayhlpm.htm
Jerry[/quote]
I did not know someone made such a thing lasersbee said:
I like that one.... "Chinese MilliWatts"..... ;D ;D ;D ;D
Jerry[/quote]
hey now!
but yeah...inflated measurements is more or less internationally accepted marketing strategy nowadays. :-/
Some of us Chinese folks stick to the rules...others don't and we get treated the same, I guess for China theres still that "incentive" issue of honesty
Hmmmm my X-25 is rated at about 33mW, and this is what it can do....
1. Can pop sharpied / Black balloons.
2. Beam clearly visible in night sky
3. Hit clouds easily at dusk
4. Slooooowly burn through black coloured scotch tape ( the real thin stuff). That was with fresh batteries from a close distance.
A 5mW would fall severely short of the above descriptions. Only real way to be sure is to get it tested with a LPM....Laserbee much?
1. Can pop sharpied / Black balloons.
2. Beam clearly visible in night sky
3. Hit clouds easily at dusk
4. Slooooowly burn through black coloured scotch tape ( the real thin stuff). That was with fresh batteries from a close distance.
A 5mW would fall severely short of the above descriptions. Only real way to be sure is to get it tested with a LPM....Laserbee much?
