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Review: O-like 400mW "New" 532nm laser [Warning, big picz]

Eudaimonium

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Hey people,

Recently me and a buddy of mine saved up money and went for high power green laser (as high power green was all that's missing from our collective collection
)

So naturaly we went for O-like's budget choice and I bring you my opinions (and 10 MB of photos).

Laser at hand:
http://www.o-like.com/index.php?main...roducts_id=121

Price in total was $234

Laser was shipped 8/11/2011 and arrived 8/22/2011. Pretty darn fast, shipping from China to Croatia.

So da box arrived:


Close up on declaration:

Looking good


Now, inside the box:

Well packed if you ask me.



Charger with US-style plug.

Will be giving it away with next heatsink purchase as it's useless to me.

Now, the battery included seems to be good:


3.88 V right out of the box, ready to go.

Here's the laser itself:

Compared to battery for size reference.


Comes with line generation lens right out of the box.


Tailcap detail.


It feels really good in hand. It's a bit heavier than I'd expected, too.

I went to put the battery in but first I took a look in the barrel and found this:

There's some piece of wire going around, not sure what's that supposed to be. My bet, resistive wire to get really small ohm value for possibly voltage reference. In any case, doesn't look all that well. Inserted the battery and, used tweezers to touch the battery and host, in case of a short I can quickly break contact and remove battery. If you were to have tailcap on and battery shorted, you're holding a pipe bomb in your hand.

But, all in all:


This is one bright laser.





Beam in well lit room at daytime:



Laser is focusable by simply turning the head, as you can see.

My impressions:

Battery barrel is not too narrow, can fit all batteries, including protected ones.

Heatsinking of the laser is done really well, even after short operation of 10-15 seconds I can feel the heat coming out of the head, and after taking some photos and having the laser on for longer time, I could felt it getting warmer and warmer.

This means that there's a really good thermal contact and diode and/or crystals are being well cooled.

Power appears to be very stable and laser stays in firm TEM00 mode all the way. No fluctations or mode hops.

On the front of the head, there's a small thread allowing usage of star caps and all manner of diffraction grating goodness.
Pros:
-Epic design
-Good heatsinking
-Stable power
-Smooth threads
-Clicky switch at tailcap
-Focusable, smooth action
-Comes with battery, charger, and line generation lens
-Fast shipping!

Cons:
-Clicky, although has a good action, is very light to the touch - simply touching it causes the laser to flicker
-Charger included was in US style plug
-Driver heatsinking questionable

Sum up: Buy it. Now.

For $234 this is the best greenie you can get.

Video added! :D
 
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Wow, GREAT review for a what seems to be great laser! Hope to see some burning videos and more beam shots soon, LOVE IT! +rep

-Dustin
 
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wow bravo čestitam :)
very nice review, I hope to see some beamshots and some burning videos ;)
+1 rep
 

Eudaimonium

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Well, my DIY-ed measuring instrument would need calibration, but I could compare the measurement to other lasers, I can power a 445nm diode at 500-600mA and compare it to the green, we should have somewhat aproximate understanding of power, right?

@lovellaser, hvala :) Beamshots and videos to come soon.

EDIT- Dustin, I have not recieved any messages, but consider this the reply. :)
 
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Eudaimonium

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I'm sorry, test what? You mean, did I measure the output power? Read the post above yours :p

Also guys, sorry but I just found out that my parents have borrowed my pocket camera to somebody, the one I use to make videos. My DSLR cannot take videos.

So I'll get you the video when I can. Man, This beam sure is really bright at sundown.

 

Vextor

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...
Heatsinking of the laser is done really well, even after short operation of 10-15 seconds I can feel the heat coming out of the head, and after taking some photos and having the laser on for longer time, I could felt it getting warmer and warmer.
This means that there's a really good thermal contact and diode and/or crystals are being well cooled. ...
What about its duty cycle and divergence?
 

Dawinzi

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Wow, what a cool unit. Nice Pictures. I really like the color and Look of that Laser. Please show us some nightshots and it would be nice to see the size of the dot at 20-30 meters.
 

Eudaimonium

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Duty cycle is stated on the website : 100 seconds on, 60 seconds off. I have not tested that.

Divergence is also a moot point since the laser is focusable, would take 5 minutes flidling with it to get the tightest spot possible. Which doesn't matter, since when you use the laser, you just aproximately refocus it and call it a day. If you really want, I'll take divergence measurements.

Additional info :

Draw from 3.7 V battery is 1.87 Amps
Beam at aperture appears to be exactly 3 milimeters wide.

Now, as I said, my crude DIY measuring instrument would need calibration but it shows this green laser as exactly 350mW (large margin of error possible, +/- 50mW), but it stays at that power for very long time - exeptionally stable unit.

Also, with 3mm wide beam as is, it's able to light a match without refocusing.
 

Xtrm2Rick

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Great review, and awesome laser!

I really like this host and it kinda reminds me of the host design you made in 3D studio max :D
 

InfinitusEquitas

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@Eudaimonium

Do you by any chance have the old type 400mW torch? Or can can you take a pic side by side with another common host?

I've been eyeing this laser for a while:p
 

Eudaimonium

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Sorry Infinitus, but I would really love to be able to say "Yeah I'll compare it to whatever you want :p "

I can take pictures side by side with Ultrafire 501 and 502 for now. I also have a small 445nm labby setup that I'll power with 1.2 A and compare the beam brightness.

Pictures to come.
 




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