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Old 06-24-2010, 06:54 PM   #1
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Thumbs down Scam: Beamq 200mW 405nm

I ordered this Laser in early march and it arrived almost 4 weeks later.

here's the link: 200mW blue violet laser pointer : BeamQ Laser Pointers, 50mw-200mw,Green,Red,High Power,Cheap

It came with charger but without battery and here is such a battery more than 15$ so I ordered some online and had to wait for more than 2 weeks.
The host itself actually feels really good and quite heavy and is also easy to adjust.
With a 3.7V cr123a it performed quite well as shown in the vid from Beamq but the on/off switch was a bit defective and I had to repair it.
Also a big minus is the horrible beam divergence. On short distance up to 2m focusing works really good you can easily burn things but on longer than 2m you can't get the point smaller. I measured the dot size at 6m is about 25mm big
Some days later, after about 30min burning time (not at once of course) it dimmed down to a very low level maybe 1mW and it's really hard to see
I left several messages at beamq and also tried to contact them by phone but I didn't even get an answer... so thumbs down for that company
And the perfidiously part of them is that they say everywhere thay will 100% refund nomatter what also seen here: BeamQ?
and here: is this a good review site?

Unfortunely I wasn't on LPF yet that time and I couldn't find anything bad about Beamq, also it was back then the cheapest 200mW bluray that I found.

So all in all to say that was just money threw out of the window


I haven't made pics from when it still worked but here's some when it dimmed down:

the dimmed beamq:


compared to a ~10mW pen:


and additional a 495mW:
Attached Thumbnails
Scam: Beamq 200mW 405nm-dsc02878.jpg   Scam: Beamq 200mW 405nm-dsc02879.jpg   Scam: Beamq 200mW 405nm-dsc02881.jpg  
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405nm 200mW Beamq *broken - scam* - link
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Last edited by Burnsy; 06-25-2010 at 08:49 AM.
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Old 06-24-2010, 08:48 PM   #2
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Default Re: 200mW 405nm from Beamq

This is sad to hear ;(
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Old 06-24-2010, 08:55 PM   #3
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Default Re: 200mW 405nm from Beamq

Sorry to hear.
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Old 06-24-2010, 09:10 PM   #4
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Default Re: 200mW 405nm from Beamq

First off. Sorry to hear about your experience

Quote:
Originally Posted by Burnsy View Post
I haven't made pics from when it still worked but here's some when it dimmed down:

the dimmed beamq:
Does anyone know what actually happens to the diode when it goes like this? I have a ~200mW (180mW measured when it was working) that looks *EXACTLY* like this.

What's funny is that the diode seems to develop extremely amount of heat even to generate this slight dim light. It gets burning hot right away.

Over heating issue? Diode short of some kind?
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Old 06-24-2010, 09:14 PM   #5
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Default Re: 200mW 405nm from Beamq

COD, catastrophic optical damage, diode becomes incredibly inefficient.
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Old 06-24-2010, 09:30 PM   #6
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Default Re: 200mW 405nm from Beamq

Quote:
Originally Posted by Prototype View Post
COD, catastrophic optical damage, diode becomes incredibly inefficient.
Which optical part fails? And how does it fail?

And what is the main cause for this failure? Just poor diode quality? Insufficient cooling?

Any input appreciated :-)
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Old 06-24-2010, 09:39 PM   #7
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Default Re: 200mW 405nm from Beamq

It can happen when a diode is overdriven, heruur's 2.6W 445nm diode is still running, but it is only doing about 300mW at over 650mA (no lenses for any of these readings), it suffered from massive COD from being overdriven so hard. I'm not sure how exactly it happens, just that it's bad.
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Old 06-24-2010, 09:43 PM   #8
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Default Re: 200mW 405nm from Beamq

Quote:
Originally Posted by Prototype View Post
It can happen when a diode is overdriven, heruur's 2.6W 445nm diode is still running, but it is only doing about 300mW at over 650mA (no lenses for any of these readings), it suffered from massive COD from being overdriven so hard. I'm not sure how exactly it happens, just that it's bad.
Ah. Equals the cheap Chinese companies we obviously dealt with used diodes not at all suitable for the rating. Or even purchasing lower rated pointers, potmodding them and sending out with new stickers Gotcha.
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Old 06-24-2010, 09:43 PM   #9
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Default Re: 200mW 405nm from Beamq

To much voltage mostly. Also poor heat sinking. Part of the LD cavity reflector melts.
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Old 06-24-2010, 09:45 PM   #10
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Default Re: 200mW 405nm from Beamq

Quote:
Originally Posted by Tech_Junkie View Post
To much voltage mostly. Also poor heat sinking. Part of the LD cavity reflector melts.
Thanks for summary.

My pointer probably fits in to both of the above.
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Old 06-24-2010, 09:51 PM   #11
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Default Re: 200mW 405nm from Beamq

Sometimes you can get a reflection back into the diode, and that will cause COD too. This can happen sometimes when you turn the laser on with the dust cap on. Happened to my first PHR.
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Old 06-25-2010, 08:48 AM   #12
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Default Re: 200mW 405nm from Beamq

Yeh I think they did this with mine too.
It's simply a diode not strong enough and they overdrove it.
Make more money using cheaper components... that's the way they think

Funny was also first they answered really quick and nice and after I paid for it
they waited a long time to answer and when I told them that it doesn't work anymore and and asked for refund (at least a partial) they didn't answer anymore!
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655nm 195mW O-like Dilda
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532nm 77mW Rayfoss
532nm 85mW DL Viper
473nm 104mW DL Spartan - Review link
445nm 1.6W Ehgemus/DTR - link
445nm 268mW Ehgemus
405nm 200mW Beamq *broken - scam* - link
405nm 620mW 12x Chrome Pocket - link

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Old 06-25-2010, 02:42 PM   #13
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Default Re: Scam: Beamq 200mW 405nm

eBay is full of diodes that are rated 300mW, 500mW, 1000mW. But what they dont tell you is they will only last minutes at those powers. Its typical hype. Dont always believe what you read, especially from someone who is trying to sell you something.
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Old 06-25-2010, 02:52 PM   #14
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Default Re: Scam: Beamq 200mW 405nm

I had a few chinese pointer tumm up like that. its proper irritating, but you cant expect a whole lot for under 20$


i finally got my ~.5W of 532, so im hooked for a while
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Old 06-25-2010, 03:34 PM   #15
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Default Re: Scam: Beamq 200mW 405nm

If you have the ability... buy another LD on the Forum and
replace it...

Jerry
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Old 06-25-2010, 04:00 PM   #16
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Default Re: Scam: Beamq 200mW 405nm

Quote:
Originally Posted by lasersbee View Post
If you have the ability... buy another LD on the Forum and
replace it...

Jerry
Hey Jerry for the tip

I think I could open that host
But are you sure that it's the diode that was killed?
Or could it also be something else?
Also what diode would be good for it?
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- Pics of my avatar *link*-

655nm 195mW O-like Dilda
635nm 45mW Sanyo Micro
594nm 2.5mW Laserglow Rigel
532nm 607mW O-like
532nm 77mW Rayfoss
532nm 85mW DL Viper
473nm 104mW DL Spartan - Review link
445nm 1.6W Ehgemus/DTR - link
445nm 268mW Ehgemus
405nm 200mW Beamq *broken - scam* - link
405nm 620mW 12x Chrome Pocket - link

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