Old 01-07-2015, 06:06 PM #1
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Default CNI MGL MBL 4 Watt Lasers

Guys,

I need some pro and no go opinions regarding these lasers, what do you all think? Worth a risk to buy?

CNI Model MGL 4W MBL 4W High Power Green Blue Lasers with DPSSL Driver | eBay


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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 01-08-2015, 01:22 AM #2
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Default Re: CNI MGL MBL 4 Watt Lasers

Risk? What risk? There's a photo of both of them running, and the PSU is included. What more do you want??

You better buy those soon, or I'm going to nab them.
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Old 01-08-2015, 01:54 AM #3
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Default Re: CNI MGL MBL 4 Watt Lasers

I second what Cyp said. I have a question for you though, you seem to be collecting quite a lot of very powerful lasers- do you use them for something? Or just collecting?

Edit: just rwalized that listing is for both lasers. If you are even considering it, buy it now- they wont be there long!

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Old 01-08-2015, 02:16 AM #4
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Default Re: CNI MGL MBL 4 Watt Lasers

Agreed with the two above. Look at the seller's feedback, doesn't appear to be any risk there.
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Old 01-08-2015, 05:38 AM #5
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Default Re: CNI MGL MBL 4 Watt Lasers

OK, he had another one I'm going to get from him, nab!

Thanks, I don't know what happens to them over time, if they loose much power or what. I just have an interest in high power lasers, I don't really have a use for them.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 01-08-2015, 04:38 PM #6
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Default Re: CNI MGL MBL 4 Watt Lasers

Quote:
Originally Posted by Alaskan View Post
I don't know what happens to them over time, if they loose much power or what. I just have an interest in high power lasers, I don't really have a use for them.
Lab lasers don't drop in power as much as handhelds due over time. The cooling in lab lasers is much better and the diodes are driven at reasonable currents.
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Old 01-08-2015, 06:05 PM #7
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Default Re: CNI MGL MBL 4 Watt Lasers

Still shows available.... thought you were buying them?
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Old 01-08-2015, 06:58 PM #8
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Default Re: CNI MGL MBL 4 Watt Lasers

I decided to just buy a green one on a seperate listing
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 01-08-2015, 07:33 PM #9
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Default Re: CNI MGL MBL 4 Watt Lasers

Got it
I also have no "use" for any of my lasers other than pure magical pleasure and fun building.
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O-Like mini red/green to yellow module
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Old 02-08-2015, 05:53 PM #10
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Default Re: CNI MGL MBL 4 Watt Lasers

Just an update to the thread:

Photo of output on a foggy night, I only ran it for about 30 seconds outside when this photo was taken, afraid to run it much longer for two reasons, the cold and the neighbors who might object. So powerful the light from the side of the beam lights up the side of a nearby house and cars stopping on the street.... Quickly went back inside before I got reported for disturbing the peace among other possible issues which could be brought up (no need to call me out on them, I know, but I had to try it outside at night at least once). I need to take a trip out into the wild to play with it longer using a sine wave 12 VDC inverter to power it. With something like this, you can't point it at anything, only high in the sky, preferably during a foggy or low cloud deck night. This night was more like that, no fog at standing ground level, but at roof top level and above, the fog too dense to bother any airplanes with it. No, no photoshop or long exposures, this thing was bright, I was kidding earlier.

I'm itching to put a concave lens on it to expand the beam coupled with a 12 inch diameter PCX lens I have to see what it does at uber low divergence from mountain top to mountain top when I can do so, only problem is the glass lens is so damn heavy, I ordered a 300mm diameter 600mm FL Fresnel lens to give it a try with that too.



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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 02-08-2015 at 08:05 PM.
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Old 11-27-2015, 09:48 PM #11
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Default Re: CNI MGL MBL 4 Watt Lasers

I bought it, had fun with it, but want to sell it now to pay for a new toy. Anyone want to help determine a good price for it for me before I list it? I'm in Anchorage, Alaska so shipping isn't cheap, probably 100 dollars.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 11-27-2015, 09:56 PM #12
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Default Re: CNI MGL MBL 4 Watt Lasers

Quote:
Originally Posted by Alaskan View Post
I bought it, had fun with it, but want to sell it now to pay for a new toy. Anyone want to help determine a good price for it for me before I list it? I'm in Anchorage, Alaska so shipping isn't cheap, probably 100 dollars.
Hum...I think somewhere along the lines of $1,200-$1,500

-Alex
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Old 11-27-2015, 09:58 PM #13
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Default Re: CNI MGL MBL 4 Watt Lasers

That's what I was thinking too, thanks.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 11-27-2015, 10:08 PM #14
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Default Re: CNI MGL MBL 4 Watt Lasers

Well darn, I'm late to the party, it says sold.

WOW, I searched his items for laser and he has more stuff, the novalux I have heard are very temp picky, but is that 49 dollar lens a telescope...grrr I'm asking and will probably see it sold in a minute.

http://www.ebay.com/sch/m.html?_odkw...laser&_sacat=0


Is this a telescope optic, I wonder what the coating is for nm range wise?
http://www.ebay.com/itm/LASER-OPTIC-...4AAOSwBLlVOES5
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Last edited by RedCowboy; 11-27-2015 at 10:29 PM.
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Old 11-27-2015, 10:12 PM #15
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Default Re: CNI MGL MBL 4 Watt Lasers

That ebay listing was much earlier in the year, I bought the 4W 532nm laser of the same type from the same seller which I am now wanting to sell. I just put it on Craigs List here in Anchorage hoping not to have to bother with shipping, if I can find a local buyer.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 11-27-2015, 10:18 PM #16
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Default Re: CNI MGL MBL 4 Watt Lasers

Quote:
Originally Posted by Alaskan View Post
That's what I was thinking too, thanks.
You are welcome

-Alex
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