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Old 07-25-2017, 10:52 PM #33
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Default Re: Thor Ultra 5W Blue Laser

Ouch! That's too bad. Might as well use the 44 as this diode, then.


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Old 07-25-2017, 10:56 PM #34
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Cool Re: Thor Ultra 5W Blue Laser

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Originally Posted by paul1598419 View Post
Ouch! That's too bad. Might as well use the 44 as this diode, then.
yes its correct i only got 1 long time ago and gave up when doing some test and got more 44 from dtr
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Old 07-26-2017, 02:42 AM #35
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Default Re: Thor Ultra 5W Blue Laser

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Originally Posted by Alien Laser View Post
I used it the diversity is worst then NDB7875, its almost the same as 44 maybe just 0.5mm smaller
DTR, took the picture long time ago.
Wow as bad as the 44, but almost twice as expensive? That's to bad, was hoping for a nice tight dot. Still it puts out almost 6 watts so she's no slouch.
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Old 08-05-2017, 09:28 AM #36
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Default Re: Thor Ultra 5W Blue Laser

I picked up a LPM from astralist and ran a few tests. One thing I found is that the output is greatly affected by the temperature of the laser. It's rather warm in my house this time of year, so I got a max of 5.7 watts which slowly but steadily fell as it got hotter. Wondering if the converse would also be true, I placed the laser in the freezer for 20 minutes and ran the test again which shot up to 6.9 watts. While I won't be doing that again, I was shocked to see that kind of difference in power with the temperature difference.
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Old 08-05-2017, 01:23 PM #37
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Default Re: Thor Ultra 5W Blue Laser

They do like the cold but 6.9W?
Everyone seems to think its a 7A75 which doesn't add up.
You got a lot of moister on the lens didn't you with the freezer test?
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Old 08-05-2017, 06:45 PM #38
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Default Re: Thor Ultra 5W Blue Laser

Yes, a cold diode is a happy diode. No doubt about it. That is why lab lasers are actively cooled. Still, for the money, I think the NUBM44 is the better choice.
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Old 08-11-2017, 01:18 PM #39
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Default Re: Thor Ultra 5W Blue Laser

Quote:
Originally Posted by Brewdiver82 View Post
I picked up a LPM from astralist and ran a few tests. One thing I found is that the output is greatly affected by the temperature of the laser. It's rather warm in my house this time of year, so I got a max of 5.7 watts which slowly but steadily fell as it got hotter. Wondering if the converse would also be true, I placed the laser in the freezer for 20 minutes and ran the test again which shot up to 6.9 watts. While I won't be doing that again, I was shocked to see that kind of difference in power with the temperature difference.
IMO, with this knowledge, then an LPM recording video (even with professional/branded LPM) can be invalid if the laser's seller managed to keep the laser in a freezer before recording a measurement of the laser, right????

One can sell a claimed 10W 450nm laser, validated with videos of (several) LPM recording,
but then turns out it's only 7W when operating in a room temperature
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Old 08-11-2017, 02:00 PM #40
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Default Re: Thor Ultra 5W Blue Laser

Quote:
Originally Posted by astralist View Post
IMO, with this knowledge, then an LPM recording video (even with professional/branded LPM) can be invalid if the laser's seller managed to keep the laser in a freezer before recording a measurement of the laser, right????

One can sell a claimed 10W 450nm laser, validated with videos of (several) LPM recording,
but then turns out it's only 7W when operating in a room temperature
Yes, I guess they could, but they would lose credibility real quick after a few sales than they lose all further sales. So I can't see it being a winning idea. Hopefully nobody will go down that road.
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Last edited by BobMc; 08-11-2017 at 02:02 PM.
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