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Old 05-19-2012, 09:03 PM #33
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Default Re: 445nm laser problem..

Made a video of it without focusing lens..

Also i noticed the head is getting really hot fast.
I didn't had the laser on this long before, so i noticed temperature is rising really fast when i shot this video were i had it on longer then on/off.
After the video was done i removed the batteries, and while uploading the video i touched the host again and it was still warm.

Something aint right inside for sure... and i think it's the driver couse of the heat it reaches quick.
*Low output/lot's of heat.

Video:



Cheers, sm.


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Old 05-19-2012, 09:05 PM #34
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Default Re: 445nm laser problem..

That doesn't look like your typical output. Looks more like a zombie diode - the lines on the edges indicate that the center emitters have blown. So it's taking a lot of current (standard) and outputting very little light, meaning the rest of the power is going to heat, explaining why it heats up so quickly.
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Old 05-19-2012, 09:05 PM #35
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Default Re: 445nm laser problem..

It looks the diode is LED, hot diode and no lasing.

I would take RHD offer to refund the money and sent him back the laser.
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Old 05-19-2012, 09:59 PM #36
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Default Re: 445nm laser problem..

Internet cafe for the win

Although it's just fast enough to load a few seconds of the video while I wait. But from what I can see, I'd tend to agree that it's LED. That's what it's looking like from that no-lens video.

So if you're up for my offer above, let's get that setup.

Or another offer you can select if it's of any interest to you:
- I'll still pay the shipping back to me, but I'd rebuild this same host with the 9mm diode I got from DTRs vet section sale last month (I've had it here, not decided on what I'd build it into), and then I'd use one of the new "magic" drivers that I showed off in another thread a few weeks ago. It's neat, completely polarity agnostic. You can put the batteries in any way you want, and the laser keeps working. I'd pay shipping both ways.

Let me know. If you want to think about it that's cool. Maybe email me, since I'm leaving this coffee shop shortly. Though I think I'll have wifi where I'm going tomorrow, so I may be able to check this thread again around this time tomorrow. (email I can get almost any time).

As an FYI to those curious. Loading just this one thread on LPF logged over 3Mb of data. That is absolutely disgusting, and I've already got avatars turned off. That 3Mb ain't coming from the text.......
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Old 05-19-2012, 10:18 PM #37
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Default Re: 445nm laser problem..

Quote:
Originally Posted by rhd View Post
Internet cafe for the win

Although it's just fast enough to load a few seconds of the video while I wait. But from what I can see, I'd tend to agree that it's LED. That's what it's looking like from that no-lens video.

So if you're up for my offer above, let's get that setup.

Or another offer you can select if it's of any interest to you:
- I'll still pay the shipping back to me, but I'd rebuild this same host with the 9mm diode I got from DTRs vet section sale last month (I've had it here, not decided on what I'd build it into), and then I'd use one of the new "magic" drivers that I showed off in another thread a few weeks ago. It's neat, completely polarity agnostic. You can put the batteries in any way you want, and the laser keeps working. I'd pay shipping both ways.

Let me know. If you want to think about it that's cool. Maybe email me, since I'm leaving this coffee shop shortly. Though I think I'll have wifi where I'm going tomorrow, so I may be able to check this thread again around this time tomorrow. (email I can get almost any time).

As an FYI to those curious. Loading just this one thread on LPF logged over 3Mb of data. That is absolutely disgusting, and I've already got avatars turned off. That 3Mb ain't coming from the text.......
e-mailed you
Maybe we can work something out on that other build we have going on.

Cheers, sm.
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Old 05-20-2012, 01:09 AM #38
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Default Re: 445nm laser problem..

Quote:
Originally Posted by rhd View Post
As an FYI to those curious. Loading just this one thread on LPF logged over 3Mb of data. That is absolutely disgusting, and I've already got avatars turned off. That 3Mb ain't coming from the text.......
It is me, I use very heavy fonts in my posts. I'm sorry!
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Old 05-22-2012, 10:36 PM #39
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Default Re: 445nm laser problem..

Alright - so we've got this laser heading back to me.

Will do some sort of video unboxing / teardown when it arrives.
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Old 06-05-2012, 04:20 AM #40
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Default Re: 445nm laser problem..

Received the laser today.

The behavior doesn't seem strange or undiagnosable in terms of how it behaves - it's LED. I turn it on, and it's LED from minute one. I don't get any higher output, just straight to LED. So as far as the issue here goes, it's a diode that has gone LED. Relatively normal / boring / uninteresting....

.....except for the fact that I swear to science that in it's LED state, it's putting out *some* non-445 light. Or at least, some light that is far enough from the laser's normal wavelength to be producing a noticeably different colour at part of it's output pattern.

I'm going to try and find my spectrometer - it's packed away in a box, and figure out what's happening. There's either some green here, or I'm really going crazy.

EDIT:
Apparently I'm not crazy. This is the output of an LED'd 445 diode. Very skewed into the high blues and near greens when you consider. Neato!

Attached Thumbnails
445nm laser problem..-led.png  
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Last edited by rhd; 06-05-2012 at 04:27 AM.
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Old 06-05-2012, 04:22 AM #41
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Default Re: 445nm laser problem..

Pictures next to a typical 445?
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Old 06-05-2012, 06:15 AM #42
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Default Re: 445nm laser problem..

Smeerworst: Did you notice the colour (a green shade) on your end?

If you did, you probably told me about it, and I'm sure I thought you were crazy
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Old 06-05-2012, 08:52 AM #43
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Default Re: 445nm laser problem..

Interesting. Got any video?
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Old 06-05-2012, 01:24 PM #44
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Default Re: 445nm laser problem..

Quote:
Originally Posted by rhd View Post
Smeerworst: Did you notice the colour (a green shade) on your end?

If you did, you probably told me about it, and I'm sure I thought you were crazy

Hi RHD,

Yes i noticed a green shade and told you about it

So i'm not crazy afterall ? ^^
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Lazeerer custom polished L6 porcupine build 3.8mm 405nm 1W
Dragonlaser Spartan 405nm 300mW Polished
SKYlasers HL405 405nm 550mW
2×WLasers Sonar Elite Pro 3×Sonar white
2×Dragonlaser Spartan 447nm 1.1W with Beam Expander
TrustFire Cree Z5 2W+ 445nm Custom build
Blord build Big Boy 3W 445nm
Wicked Lasers S3 Arctic 445nm 2W 1.25 etc
Ultrafire C3 host Osram 450nm 180mW single mode
Optotronics RPL-B 473nm peak@112mW viasho upgraded
3XWLasers S3 473nm portable 112mW LE 1×S2
473nm >300 Lab laser
1.4W 520nm - The Hulk - MS-SSW-II Custom Direct Green DTR
SKYlasers PL520 520nm 80mW
Laserglow Hercules-650 532nm 850mW 777mW avg
Optotronics 450 RPL-G 532nm >570mW peak
Wicked Lasers Krypton 1W 532nm avg 997mW pk 1268mW
Jetlasers PL-E Pro >800mW
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Old 06-05-2012, 03:20 PM #45
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Default Re: 445nm laser problem..

Quote:
Originally Posted by Smeerworst View Post
Hi RHD,

Yes i noticed a green shade and told you about it

So i'm not crazy afterall ? ^^
No, apparently RHD is!

They say there are three things that start to go in your mind as you go crazy... First is your sense of smell, the second is your memory and I forget the third.
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Old 06-05-2012, 03:43 PM #46
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Default Re: 445nm laser problem..

Very interesting wonder what happens here and want to see pics

Greetings,,
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Old 06-05-2012, 07:16 PM #47
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Default Re: 445nm laser problem..

Quote:
Originally Posted by Smeerworst View Post
Hi RHD,

Yes i noticed a green shade and told you about it

So i'm not crazy afterall ? ^^
Ya.... you're not crazy

In my defense though, I must have really thought you were! Multiple colours out of a single laser diode? Impossible! (except that it apparently isn't)

Quote:
Originally Posted by tsteele93 View Post
Interesting. Got any video?
Quote:
Originally Posted by offroadfreak8582 View Post
Very interesting wonder what happens here and want to see pics
You can't capture this in photos/video I'm afraid. I can't even capture 442nm vs 458nm beam distinctions, so there's no way the camera will pick up the shade distinctions in this output pattern, particularly since they're present in a gradient more so than they are any sort of distinct outputs. And in terms of just seeing the output shape, it's not interesting. It's an LED'd diode output, that's it.

So the spectrometer reading is the most interesting visual I can give you
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