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Old 09-04-2010, 01:09 PM #177
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Default Re: List of 445nm diodes

Eventually it won't matter that much - the die will heat up regardless of how big a heatsink you use... you're burning 8 watts in a 5.6mm package on the end there. The thermal resistance between die and case, and case and aixiz will be such that it runs hot quickly even with that maxsink still at room temperature


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Old 09-04-2010, 01:35 PM #178
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Default Re: List of 445nm diodes

Quote:
Originally Posted by Benm View Post
Eventually it won't matter that much - the die will heat up regardless of how big a heatsink you use... you're burning 8 watts in a 5.6mm package on the end there. The thermal resistance between die and case, and case and aixiz will be such that it runs hot quickly even with that maxsink still at room temperature
This is why thermoelectric cooling is used to reduce the temperature of the module and diode to a level below room temperature.

The heat doesn't propagate from the diode fast enough (regardless of the heatsink) to make a large heatsink effective.

In the end it is only 8W in a tiny space. In the AixiZ module, the only contact is between the outer edge of the diode and the module housing.

If there was direct contact to the die's mounting block, heatsinking would be increased massively.
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Old 09-04-2010, 02:21 PM #179
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Default Re: List of 445nm diodes

I know it would have been better to let it cool for 5-10min between setting but I was trying to get through it last night. I think I will run another test when I get home from work at 1.8A from a cold start and see how much of an increase there is.

EDIT

Home now and ran a test from a cold start at 1780mA@4.6V=1778mW


Last edited by DTR; 09-05-2010 at 02:10 AM.
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Old 09-06-2010, 06:47 AM #180
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Default Re: List of 445nm diodes

Here's my 445 build specs:

Diode: XJ-A140
host: Jayrob's 18650
driver: v5 set @ 1000mA
lense: Jayrob's 405-G-1
Output: peak 1305mW, avg 1285mW
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Old 09-07-2010, 05:04 AM #181
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Default Re: List of 445nm diodes

^ That's some 20% more efficient than best on the list so far there extelon. Are you doing something different? How did you set the driver?

M
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Old 09-07-2010, 05:58 AM #182
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Default Re: List of 445nm diodes

Could be the meter...

Is it an optical meter?
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Old 09-07-2010, 06:40 AM #183
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Default Re: List of 445nm diodes

I saw this unit Extelon has and his 12X thinking the numbers were a little high.

Quote:
Originally Posted by extelon View Post
Ive just finished my 12x build, here are the specs:

Diode: Lite-On SF-BW512L 12x diode.
host: Jayrob's Chrome mini
driver: v5 set @ 500mA
lense: Jayrob's 405-G-1
Output: peak 787mW, avg 769mW

He is getting around the same power as I am with 80mA less.

Extelon what LPM are you using?

Last edited by DTR; 09-07-2010 at 06:44 AM.
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Old 09-07-2010, 01:48 PM #184
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Default Re: List of 445nm diodes

I have a Kenometer Pro. Perhaps it is the meter. I'm sending it in to Kenom to have the firmware updated... I can retest once I get it back. I'll post a picture of the meter's screen when I get back on my PC in a bit.

For the 445, my first build set at 1000mA read around 1050mW and it had a 130 diode... The one I just reported was a 140 diode, and the only difference on build (besides the diode source) was on the second diode used jayrob's copper module rather than a Aixiz one.

(edit)

I waited to send back my LPM, and hurry and re-checked my lasers... here are the readings I just took of my 405nm (808mW) and 445nm (1303mW).
Attached Thumbnails
List of 445nm diodes-405-lpm.jpg   List of 445nm diodes-445-lpm.jpg  
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Last edited by extelon; 09-07-2010 at 10:01 PM.
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Old 09-08-2010, 02:41 AM #185
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Default Re: List of 445nm diodes

That seems to be one efficient diode! You say first build... Is this the same driver at the same setting?

It sounds like I'm sceptical but I'm not. It's interesting the A130 was about 1W and the A140 was 1.3W for the same input. Batch differences aside that's good for the A140s. It ignores all the ones that put out less but I like the reading. Thanks for the clarification.

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Old 09-08-2010, 03:12 AM #186
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Default Re: List of 445nm diodes

Yes, same driver and same settings... the only difference between the two was the A130 vs A140 and the Aixiz module vs jayrob's copper one.

I am a bit skeptical myself... Once I get my LPM back, I'll recheck to see if the was potentially a firmware issue.

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Old 09-09-2010, 04:21 AM #187
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Default Re: List of 445nm diodes

The numbers for my 445 test can be found here.

Yet another 445nm labby

I'm not going to repeat them all here though.

It's an a130 diode using an aixiz 445 lens.
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Old 09-09-2010, 04:32 AM #188
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Default Re: List of 445nm diodes

some data from an A130

1900mA
alot of mW (my laserbee don't go that high)
2 microflex v5 in parallel
405-g-1 lens
jayrob 18650 host
AW 2900mAh 18650
about 2 hours burn time on it.

burns like crazy I will post a vid soon in a different thread.
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Old 09-09-2010, 04:37 AM #189
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Default Re: List of 445nm diodes

Quote:
Originally Posted by Glutton View Post
some data from an A130

1900mA
alot of mW (my laserbee don't go that high)
2 microflex v5 in parallel
405-g-1 lens
jayrob 18650 host
AW 2900mAh 18650
about 2 hours burn time on it.

burns like crazy I will post a vid soon in a different thread.
Are you experiencing any overheating issues running the drivers in parallel? And you say you are using just one 18650.
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Old 09-09-2010, 05:02 AM #190
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Default Re: List of 445nm diodes

Quote:
Originally Posted by DTR View Post
Are you experiencing any overheating issues running the drivers in parallel? And you say you are using just one 18650.
It gets hot but I run the laser on really short cycles. I also used quite a bit of thermal epoxy to glue the two drivers together.

Yes, I am using one AW 2900mAh 18650 battery.

Every now and then the laser will dim or flash rapidly if I use a different battery. I tested the current draw at 4.9A across the AW battery and about 4.3-4.6 with others.
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Old 09-09-2010, 05:14 AM #191
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Default Re: List of 445nm diodes

Yep, AW is the way to go for high current draw...

If your getting nearly 5 Amps current draw, that thing must be a light saber...
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Last edited by jayrob; 09-15-2010 at 07:46 AM.
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Old 09-09-2010, 05:18 AM #192
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Default Re: List of 445nm diodes

Quote:
Originally Posted by jayrob View Post
Yep, AW is the way to go for high current draw...

If you getting nearly 5 Amps current draw, that thing must be a light saber...
yeah its almost too much power for a hand held... if there is such a thing
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Laser 530: 405nm vs 445nm comparison This thread Refback 05-08-2017 12:38 PM
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