I have seen a couple of threads for this company, however, I haven't seen much if any feedback for them.

Here is a link to their laser section. Prices look good....just don't know if their products are up to par.
Lasers - Laser Gadgets - High Power Laser Pointers
http://www.chinavasion.com/

Everything else outside of the laser section actually looks pretty decent...
Thanks

$51 for a 200mW greenie?!? That sounds almost too good to be true. I think I'd want to wait until someone from here posted test results.

It's too bad we don't have an arrangement on LPF where people interested in a new product could chip in $5 or $10 to buy one for a volunteer designated tester who could check it out on his LPM and post the results for everybody.

That's not a bad idea. We have done things like that in the past and it has worked out quite well.

Just ask the company for a sample for review here. Good luck though, I'm sure 5 or more already have.

Don't the companies require some kind of credentials before sending you a free laser for review?

I've seen people without a LPM, or decent camera get lasers. The worst they can say is no.

I'm very tempted to order that green laser/LED flashlight combo.
Ultra Power 200mW Green Laser Pointer + LED Torch Light

I bought a 200mW green from China Vasion just now. It will take 5-20 days before it arrives. I will test it and feed back at this forum. I payed €30 + €7 in shipping. It was so cheap, so I couldn't help it

Vidar

Yesterday I recieved my 200mW green laser from Chinavasion. It came in a wet cardboard package - someone have probably dropped it in a small pond. The laser was pretty wet too. Anyway, I tested it right out of the box, and found that it was dew on the lens. I did not touch the lens, but it is very easy to diassamble the apperture, so I took it out and let it dry. Works perfect now.

The beam is very bright compared to a 5mW, and it stings when I test it on my skin. The reflective appearence when shining on a black printed paper is similar to a 5mW on white paper. The beam easily lit matches when focused at 2 feet distance, and closer. Melts black and red plastics - also when not focused.

The laser is not IR filtered, so some 808nm are visible when using red protection glasses. However, the red light are focused on a very short distance, and spreads quite much. 808nm is also partially absorbed by the yag chrystal, and it also goes through the spread lens (beam expander) before it is collimated. So relatively very little 808nm light comes out of the apperture.

The green dot have a size of about 2 inch diameter at 150 feet, but can maintain small dot size at 25 - 30 feet when focused at that distance.

The build quality seems OK. Massive aluminium, safety key, and a metal press button. The adjustable focus are easy to operate. However, there is some slack between the end cap and the adjustment ring, so focus is hard to maintain 100%. I have therfor placed a small rubber gasket in order to tighten up the slack. Now the laser works perfect.

mmmm think ill go ahead myself and get one.
Ill see how close to 200mw it really is.

Good find,
Thanks

RDCII

So far so good!
Ordered yesterday and this morning I already have a tracking #er..
It said 5-6 days??? from china to tx,usa? will see..


RDCII

I have some bad news. My laser suddenly died. I was shining on some clouds last night when the beam suddenly turned itself off.

I opened the laser housing and tested the driver board on another 808nm diode I have, and it works ok.

However, there is a clearly visible spot of soot on the yag chrystal, and the laser chip. I guess the 808nm diode just burned. There is no optics between the chrystal and the diode - it is a directly pumped chrystal so to speak. The diode has no can around the chip, and the chip is in direct contact with the chrystal.

My guess is that the diode is overpowered, or I have had bad luck. The driver board have no support, so it flex when pushing the button. Maybe the diode recieved 4.2V for a short while?

I have contacted Chinavasion to report the problem. I will probably not get a replacement due to the disassambling, but it is cheaper to buy a new one than sending the defective laser back to China.

Attached there is pictures.

Vidar

I got a reply from support@chinavasion.com. They'll take a look at the photos I made, and feedback to me within 2 days. I mentioned that the pumpdiode has probably got 4.2V as the driver board flexes so much it could be contact with the laser housing (+ 4.2V).

Anyone who buy this laser, just unscrew the end cap, and put a small support under the driver board before you operate the laser.

Vidar

Ive been dealing with Chinavasion for a few years now, and they are very reliable, considering most of the suppliers in China are scammers!!

I think they are reliable too. The build quality and the power output, and the quick reply to my e-mail, isn't what you expect from other companies.
The chrystal have even attached small cooling parts on each side. This is details I could see on only expensive lasers.
I hope they can meet my complaint in a positive way, and even possibly replace my laser without discussions. We'll see.

Vidar

So far im impressed with there shipping times.
Ordered on the 28th.
Its already traveled from SHENZHEN - CHINA,
to CINCINNATI, OH - USA in 3 days!!!!
Crazy fast.
should be at my door step in 2 days..
for a total of 5 days from china to texas...
now lets hope the laser is worth a shit..


RDCII

Take out the "sponge" which covers the spring on the driver board, and put in some support under the driver board. Put the "sponge" back, and assamble. Hopefully your laser will last longer than my 5 minutes of joy with it
The laser is easy to disassamble - perfect for later tweaks

Vidar

ya I was planning on it after I saw your post about it.
I hope it they work something out with you on that one.
Maybe mine will come "dry" and not dropped.. Still though
I plan on checking it out first before I power it up.
Thanks for the heads up.

RDCII

Heres a update for those who care
Ordered and recieved my 200mw greenie from Chinavision,
From China to texas took only 6 days....
Can Well packaged, unit feels nice.
Nothing special bout the host. Came with a key tailcap lock,
Charger, battery, laser.
Here are some pictures.
Let my laserbee at work, So ill find out in a few days if its
really 200mw or not.

Thanks
RDCII

Nice! Did you know that it's possible to unscrew half of the battery housing if you have CR123 cells?

Anyways. I got a reply from Chinavasion that they could not replace my laser because I had disassambled it to take pictures... The charger does not fit either - even if it is a "European standard". Well, it says pretty clear in the warranty conditions, that I cannot have a replacement for free. It's cheaper to buy a new one, than the shipping cost from Norway to China. Later I found out they took care of shipping in case of warranty...

I will buy a new one. I blew it, and must take the blame.

When you have measured the power, please let me know the output

Nope didnt know that, thanks though.
but as long as it works, not gunna unscrew nothing... lol
Ill have it LPM'd asap. I got ready to do it then a "duh" moment.... I left it..

It burns, semi visable in a well lit room. but since this is my first green,
I cannot guess what the power just of sight.
Did you notice how small the beam is coming out the end??
its as small as my argon.. like a tiny needle beam, even messing with the focus...
its pretty small.. is that just common along greenies?


RDCII

Not really. Mine are all over the place. Personally I prefer thin beams on green lasers.

Edit: Can't wait to see your LPM results. Please test for IR as well?

mmm im gunna have to look up how...
First green, so new to IR and what not.
I got a 2.5 USB laserbee gunna test with.
So not sure how much of the results ill get is IR or how ever that works.

RDCII

Very easy, two ways to do it, either with an IR filter, or with goggles rated for 532nm.

Based on your laser collection I assume you have a second set of goggles

So let the LPM run, shine the laser on it, defocused so the dot is just a little smaller than the square, from 6" away. Measure the output, and see what you get. This will tell us green+IR.

After that, same exact procedure, but put goggles right in from of the LPM. Whatever is passing through, should be almost all IR. I mean assuming you have od 3+ goggles.

Very important, defocus the laser... especially for the second test, because if you don't you might damage the goggles.

ahhh excellent
yes I got a few googles two eagle pair,whatever the hell WL sends out with its Artic and some red ones I got of ebay. ya Ill make sure to defocus
Ill shine it through a part of glass's that arent directly where my eyes would view through, just in case
Thanks for info

RDCII