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Review: Lazerer LZSK - 532nm 400mW Green Laser Pointer w/ Case + Goggles

honeyx

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LZSK - 532nm 400mW Green Laser Pointer w/ Case + Goggles

This is my first review and English also not my native language, so sorry for the mistakes.


Shipping/Packaging
Ordered this Laser on 24.08.2011. The laser was shipped from Hong Kong on 29.08.2011 and arrived 10 day later to me. The case was well wraped into bubble foil and came in perfect condition.

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After making the order Max asked me if I want the laser to be waterproof and wish it to be send with the protection glas in front of it. He told me they are actually sold without the glas to make sure they are within the specs as the glas reduces the power by about 50mW. I told him I would like to get a waterproof one so the glas acts as a sort of dust protection and don´t care that much if there is a 50mW lost. He then went out to his supplier and got a waterproof one to send it to me. I even told him there is no need to send the case, googles and the battery as I just am interessted in this laser. He send it anyway and even droped in a charger too.
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Together with the laser I also ordered a power certificate.
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Overall Appearance/Feel
This laser looks very nice, even better than on any picture, and feels good in my hand.

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Visibility/Output
Visibility of this laser is incredible! The dot is so bright I´m getting headaches after a short while when watching on it at some distance without googles. The beam is fairly visible in a lit room. At night, the beam is extremly bright and the dot can be seen easily on clouds. Didn´t make some nightshoots as some morons in my town were pointing at plains within the last weeks and blinded a pilot. The police is still watching out for them so I don´t want to take their attention to me.

All the beamshoots were made without any fog, dust, mist or anything else to incrase the visibility. The pictures are as is and were made with a cheap Canon A460. As well as the videos at the buttom of this review.

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The beam is 3mm wide at its output and has an oval shape, though the dot appears to be round. It operates in near TEM00 but is what you would call modehopping. I for myself wouldn´t call it modehopping but some sort of drifting within the mode. It even sometimes flickers when this drifting happens.

Didn´t measure the divergence, but its better when focused to infinity than from a well focused small green laser with a thin beam diameter.


Specifications from included power certificate.

The certificate also included graphs for non-IR filtered, and just the IR power output by using a IR pass through filter.


  • Model Number – LZSK532-400
  • Wavelength - 532nm
  • Rated Power – 400mW (350~400mW as listed on their page)
  • Battery – 18650 Li-ion
  • Working Voltage: 3.7V


Their Test results.

  • Test Was Done During the First 50 Seconds.
  • Room Temp – 23.7*C
  • Distance (From Diode to Sensor) - 5.85 inch/ 15cm
  • Beam Diameter - 3mm
  • Power Surce - Fully charged 18650 Li-ion Battery
  • Test Instrument – LaserBee 2.5W USB Laser Power Meter
  • IR Output (Stable) 75mW
  • Overall Output (Max) 422mW
  • Overall Output (Stable) 383mW


My test results.

  • Clean round spot.
  • Oval shaped beam.
  • Test Instrument – DIY LPM calibrated with 10x10 Ohm SMD reistors.
  • In the first runs it peaked at 422mW, but now it even peaks at 453mW. Saddles at about 350-360mW after 3 minutes!


Yes, you read it correct. I ran it for over 3 minutes while making a video LPM-ing it. And because I couldn´t find my tripoid I cared more to hold the camera in place than watching how much time passed. To my suprise it even didn´t get warm to the touch. It was not cold like at the beginning but also not warm. I guess it reached about humans body temperature. I repeated the whole procedure, but this time I ran it for more than 4 minutes and the results were exactly the same.

I measured the power consumption too and it takes exactly 1700mA.
Having it already for 3 weeks I measured the power several times. At the beginning it always peaked at about 422mW but now it even peaks at 453mW.



Video 1


Video 2
 
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Very nice and detailed review ! Also very nice and clear pictures !

:gj:

+1:beer:
 
Thank you :) I love this Laser too. One thing I forgot to add. It also works with batteries from a laptop battery pack. You just have to modify them by attaching a blob of solder in the middle of the positive end.
 
better yet solder a thin piece of copper on the positive end of the batteries, just using solder isn't the best choice ;) nice review:beer:
 
For me this worked just fine. First I also was thinking about soldering a pice of metal, but decided not to try, as the heat might cause some demage the battery. So just quickly adding a blob of solder to the Anode won´t heat it up that much to risk the battery goes into flames.
 
well I never had a problem with that resulting in any damage. I am using a 30W solder iron and copper is pretty easy to solder fast without applying heat for a long time .. :) maybe if you use a higher wattage iron you may overheat the battery .. :shhh:
 
Sorry for sounding a bit confused, but is the laser IR filtered or not?
You made mention that it includes power ratings for both IR filtered and otherwise, but how does that work?

Is the IR filter a separate piece that comes with the package and you have the option of taking it on or off, or...?

Could you please clarify.

Thanks.
 
Sorry for sounding a bit confused, but is the laser IR filtered or not?
You made mention that it includes power ratings for both IR filtered and otherwise, but how does that work?

Is the IR filter a separate piece that comes with the package and you have the option of taking it on or off, or...?

Could you please clarify.

The laser is not IR filtered.

For the purposes of testing Max put an IR filter in from of the thermopile (LPM sensor) which blocks out IR wavelengths, so only the green light would pass through.

The IR filter does not come with the package.
 
The laser is not IR filtered.

For the purposes of testing Max put an IR filter in from of the thermopile (LPM sensor) which blocks out IR wavelengths, so only the green light would pass through.

The IR filter does not come with the package.

Thanks for the thorough explanation, it's greatly appreciated!
 
Like InfinitusEquitas already said there is no IR filter included, but your question took my attention to something I´ve overseen. On their page they are saying there are two charts. One without a IR filter to show the total power and the secound one to be IR filtered that just shows the green output.

On my Certificate there is the unfiltered total output to the left and just the IR output to the right made with a IR pass through filter that blocks the green light.

Edit: corrected this.
 
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Hm. I'd be really interested to see what happens when you measure it on an LPM with a fast-responding sensor. Based on how it looks on the 2.5W LB, I'd assume it bounces around a lot.

Might need to buy one of these and test it. :o

-Trevor
 
Hm. I'd be really interested to see what happens when you measure it on an LPM with a fast-responding sensor. Based on how it looks on the 2.5W LB, I'd assume it bounces around a lot.

Might need to buy one of these and test it. :o

-Trevor

I have yet to see a sub $400 green laser, over 200mW, that doesn't jump around like a drunken sailor.
 


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