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04-27-2015, 11:35 PM #1
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BillyBob
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532nm 200mw laser

I was wondering if this laser was accurate. I have heard that Techhood was a reputable seller. Industrial 532nm 200mW Green Dot Laser Module | eBay

04-27-2015, 11:43 PM #2
 Class 3B Laser Join Date: Jan 2014 Location: Near Mosul, Iraq Posts: 4,264 Rep Power: 2102
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Re: 532nm 200mw laser

Ask him how much of that 200mw is infrared and if he will guarantee 200mw of 532nm green. I've always found him to be reputable, at least, far more so than most China sellers but he makes mistakes from time to time, always corrects them from what I've seen so far.
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http://www.lexellaser.com/techinfo_wavelengths.htm

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Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
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Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

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04-28-2015, 01:04 AM #3
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BillyBob
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Re: 532nm 200mw laser

Alright will do, thanks for the help!

04-28-2015, 10:01 AM #4
 Class 3R Laser Join Date: Nov 2014 Location: Portland, Oregon Posts: 1,260 Rep Power: 644
olympus mons
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Re: 532nm 200mw laser

I bought two of these modules and they are 100mW including IR. sorry to bear bad news don't waste your money. They did send me a second one for free to make good but it's still not what I thought I was buying. Both Alaskan and I have looked extensively for true 200 mW modules but can't find any. O like will sell you one but that company is more trouble then they're worth IMO.
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Last edited by olympus mons; 04-28-2015 at 10:07 AM.

04-28-2015, 03:20 PM #5
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icecruncher
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Re: 532nm 200mw laser

Quote:
 Originally Posted by nwfreefly I bought two of these modules and they are 100mW including IR. sorry to bear bad news don't waste your money. They did send me a second one for free to make good but it's still not what I thought I was buying. Both Alaskan and I have looked extensively for true 200 mW modules but can't find any. O like will sell you one but that company is more trouble then they're worth IMO.
Way way back in the day, (5 years +) O-like offered a small size - 200mw module, they would hand pick a high power one for you and send (and I own one inside a Krypton Groove) like this:

100mW industrial green laser module [OLGLM100] - \$40.00 : Zen Cart!, The Art of E-commerce

Now the only one I know of is this one

Industrial/DIY Real 200mW green laser module /long duty cycle [OL-GM-200] - \$89.99 : Zen Cart!, The Art of E-commerce

Only guarantee is over 170mw per their site. I haven't seen a small module for a green DPSS approaching 200mw since. Heat and other issues, most are significantly larger. Techhood might have enough room for heatsinking in there, but as mentioned, power output isn't there.

And as mentioned, you might look at this thread first (YMMV):

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Last edited by icecruncher; 04-28-2015 at 03:22 PM.

04-28-2015, 11:00 PM #6
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BillyBob
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Re: 532nm 200mw laser

Thanks for all the help! Guess I will keep looking for a true 200mw 532nm laser.

04-30-2015, 11:08 PM #7
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icecruncher
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Re: 532nm 200mw laser

Quote:
 Originally Posted by BillyBob Thanks for all the help! Guess I will keep looking for a true 200mw 532nm laser.
You can easily find them, just probably not in the price range and physical size you want.

That being said, AND I'm not sure how accurate the mw rating is - you might try this:

http://www.laserbtb.com/productshow.asp?id=77#
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05-01-2015, 01:03 AM #8
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hwang21
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Re: 532nm 200mw laser

I've had my Optotronics 175mW go well over 200mW quite often. But it is quite expensive... best option, save up! You can't go wrong buying a quality laser from a reputable company. There are many ways to go wrong buying a cheap laser...
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05-01-2015, 10:01 PM #9
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gozert
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Re: 532nm 200mw laser

Quote:
 Originally Posted by hwang21 I've had my Optotronics 175mW go well over 200mW quite often. But it is quite expensive... best option, save up! You can't go wrong buying a quality laser from a reputable company. There are many ways to go wrong buying a cheap laser...
Sorry to go off-topic here. But I really wanted to ask someone who owns an Optotronics pen pointer.

Could you tell me how the divergence is, and if the beam at aperture is thin? I'm considering getting a 150 or 175mW model myself to take with me on the go.

Edit: http://lazerer.com/532nm-laser-modules This is what I found at Lazerer. I have no experience with them, and I'm not too sure whether or not it's a good company. They sell 30, 50 and 100mW 532nm modules.
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Last edited by gozert; 05-01-2015 at 10:09 PM.

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