Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 09-13-2015, 06:04 PM #513
Atomicrox's Avatar
Class 3R Laser
 
Join Date: Jun 2011
Posts: 2,225
Rep Power: 9926
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Atomicrox Atomicrox is offline
Class 3R Laser
Atomicrox's Avatar
 
Join Date: Jun 2011
Posts: 2,225
Rep Power: 9926
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by TaterMay View Post
I actually cut solder first, which made me decide to try out the spring. I was very surprised myself. Feel free to throw out some more ideas to attempt to burn/cut through, as I have just finished another one that hit 7.24 watts peak.
Steel wool, magnesium strip, charcoal and perhaps a thin copper wire. I never managed to ignite any of these with 3W.


__________________
405nm: NewWish (29.1mW avg|5mW rtd) | Dilda (81.5mW avg|200mW rtd) | 501B by Blord (633mW pk)
low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

HV: Flyback, Plasma Speaker, The Arcsynth and SSTC

Last edited by Atomicrox; 09-13-2015 at 06:04 PM.
Atomicrox is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 09-13-2015, 06:20 PM #514
micheal rosen's Avatar
Class 2M Laser
 
Join Date: Mar 2015
Location: Minneapolis, Minnesota, USA
Posts: 572
Rep Power: 3342
micheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond repute
micheal rosen micheal rosen is offline
Class 2M Laser
micheal rosen's Avatar
 
Join Date: Mar 2015
Location: Minneapolis, Minnesota, USA
Posts: 572
Rep Power: 3342
micheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by TaterMay View Post
As for the copper vs aluminum argument, some will say that copper will absorb the heat away from the diode better, but won't dissipate it into air as well as aluminum. However, the rate of heat exchange is dependent largely upon the difference in temperature. Since copper has better thermal conductivity, it stands to reason that the heat exchange with air should also be greater than that of aluminum.
copper has higher thermal conductivity than aluminum, and a higher volumetric heat capacity. this means copper draws heat from the source faster and is able to hold more heat without rising in temperature as much as aluminum, therefore providing the optimum conditions for the thing your heatsinking to stay cool. if the heatsink warms up (as aluminum does faster) the component also warms up, until it is destroyed from thermal damage. with copper, this happens more slowly since it rises in temperature more slowly for the amount of heat put into it.

this makes copper the ideal heat-sink, to our knowledge there is not a better material for heat sinking.

however it is not a perfect heat exchanger. copper takes more heat to create a rise in temperature. This also means it needs to expend more heat to lower in temperature, giving rise to the thought that it doesn't cool down as fast as aluminum. this doesn't make aluminum a better exchanger either, since it has a much lower thermal conductivity than copper. the best heat exchanger is diamond, after that it's silver, then copper. silver doesn't beat copper by much though, so until there are great leaps forward in artificial diamond manufacturing and machining, we will be using copper modules.

Quote:
Originally Posted by barthchris View Post
I have a bunch of Ricks hosts and heatsinks, They are the older Aluminium versions, does copper make that much of a difference?
for this diode, i would say a copper heatsink is necessary. and it makes a HUGE difference.
__________________
No, im not ACTUALLY michael rosen, thats why i spelled it micheal... not cause i'm stupid...

638nm HL63193MG @1.2A, S1 lens, 501B, 860mW
532nm 60-160mW HL from laserbtb
515nm 29mw HL-515 laserbtb
488nm JSDU 2214-20SLMD 20mW Argon-Ion
445nm 1300mw
405nm BDR-209 16x @ 0.6A, S1 lens, 501B LED'ed

Laserbee A 2W LPM 1mw resolution.

I have a good basic understanding of DPSS and gas lasers, so if you have questions, feel free to PM me! I don't know anything about electronics though.

Last edited by micheal rosen; 09-13-2015 at 06:23 PM.
micheal rosen is offline   Reply With Quote
Old 09-13-2015, 08:32 PM #515
TaterMay's Avatar
Class 2 Laser
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
TaterMay TaterMay is offline
Class 2 Laser
TaterMay's Avatar
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by micheal rosen View Post
copper has higher thermal conductivity than aluminum, and a higher volumetric heat capacity. this means copper draws heat from the source faster and is able to hold more heat without rising in temperature as much as aluminum, therefore providing the optimum conditions for the thing your heatsinking to stay cool. if the heatsink warms up (as aluminum does faster) the component also warms up, until it is destroyed from thermal damage. with copper, this happens more slowly since it rises in temperature more slowly for the amount of heat put into it.

this makes copper the ideal heat-sink, to our knowledge there is not a better material for heat sinking.

however it is not a perfect heat exchanger. copper takes more heat to create a rise in temperature. This also means it needs to expend more heat to lower in temperature, giving rise to the thought that it doesn't cool down as fast as aluminum. this doesn't make aluminum a better exchanger either, since it has a much lower thermal conductivity than copper. the best heat exchanger is diamond, after that it's silver, then copper. silver doesn't beat copper by much though, so until there are great leaps forward in artificial diamond manufacturing and machining, we will be using copper modules.



for this diode, i would say a copper heatsink is necessary. and it makes a HUGE difference.
Heat absorption and dissipation are the same process, simply in reverse. Why would aluminum dissipate heat better, yet not absorb it as well? The formulas for convection also do not take into account the surface material - only the temperature at the surface. If copper transfers heat better, it is going to take this heat out toward the surface more quickly than aluminum. Once it gets there, the dissipation is determined by the temp of the air and the surface material, along with the surface area touching the air, which will be the same for two heatsinks of the same size, yea?

Not trying to argue, just trying to understand it better, as always.
__________________
My Builds
5W+ ~470nm NUBM07E MX900 Build
5 x 7W+ 450nm MX900 Builds
3,343mW 445nm "Zombie Killer" Build
1.5W NDG7475 Ehgemus Host
1.3W+ NUGM01T
235mW PLP520-B1

LPMs
Laserbee 3.7W USB
Ophir DG-HH(10W)
TaterMay is offline   Reply With Quote
Old 09-13-2015, 08:32 PM #516
doubleone44's Avatar
Class 2 Laser
 
Join Date: Aug 2014
Location: Leiden, The Netherlands
Posts: 257
Rep Power: 307
doubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond repute
doubleone44 doubleone44 is offline
Class 2 Laser
doubleone44's Avatar
 
Join Date: Aug 2014
Location: Leiden, The Netherlands
Posts: 257
Rep Power: 307
doubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond reputedoubleone44 has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Actually. If you really care about heat SINKING, stationary water is better than copper. However, the thermal conductivity is so low that it doesn't really work in a heatsink. Also, corrosion. Everything else is right though
doubleone44 is offline   Reply With Quote
Old 09-13-2015, 08:35 PM #517
TaterMay's Avatar
Class 2 Laser
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
TaterMay TaterMay is offline
Class 2 Laser
TaterMay's Avatar
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
Default

Quote:
Originally Posted by doubleone44 View Post
Actually. If you really care about heat SINKING, stationary water is better than copper. However, the thermal conductivity is so low that it doesn't really work in a heatsink. Also, corrosion. Everything else is right though
One thing I plan on trying to work with here soon is heat pipes. You know, the hollow copper tubes with water inside that you find on computer/gaming heatsinks? The heat transfer of those is MUCH better than copper alone. I think they would also look pretty awesome on a steampunk inspired build.
TaterMay is offline   Reply With Quote
Old 09-13-2015, 08:48 PM #518
micheal rosen's Avatar
Class 2M Laser
 
Join Date: Mar 2015
Location: Minneapolis, Minnesota, USA
Posts: 572
Rep Power: 3342
micheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond repute
micheal rosen micheal rosen is offline
Class 2M Laser
micheal rosen's Avatar
 
Join Date: Mar 2015
Location: Minneapolis, Minnesota, USA
Posts: 572
Rep Power: 3342
micheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond reputemicheal rosen has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by doubleone44 View Post
Actually. If you really care about heat SINKING, stationary water is better than copper. However, the thermal conductivity is so low that it doesn't really work in a heatsink. Also, corrosion. Everything else is right though
i wasn't even thinking about water, but yeah thats right. but who the hell is gonna bother with a liquid heatsink on a handheld laser XD

Quote:
Originally Posted by TaterMay View Post
1. Heat absorption and dissipation are the same process, simply in reverse. Why would aluminum dissipate heat better, yet not absorb it as well?

2. The formulas for convection also do not take into account the surface material - only the temperature at the surface. If copper transfers heat better, it is going to take this heat out toward the surface more quickly than aluminum. Once it gets there, the dissipation is determined by the temp of the air and the surface material, along with the surface area touching the air, which will be the same for two heatsinks of the same size, yea?

Not trying to argue, just trying to understand it better, as always.
i split up to the quote a little bit:

1. exactly. aluminum doesn't dissipate heat better/faster, the temperature just lowers faster.

2. not sure... i definitely think that the surface material would influence the rate of heat exchange between the air and the heatsink, since its more conductive it will conduct heat into the air faster. but that is an interesting thing to bring up. i wonder why it wouldn't be in the equations? perhaps because the thermal conductivity of air is constant, it doesn't matter what material you have providing the heat to it. although i can hardly believe that if the air is moving past/through the heatsink continuously.

Quote:
Originally Posted by TaterMay View Post
One thing I plan on trying to work with here soon is heat pipes. You know, the hollow copper tubes with water inside that you find on computer/gaming heatsinks? The heat transfer of those is MUCH better than copper alone. I think they would also look pretty awesome on a steampunk inspired build.
i thought of that too! that would look sick. i wonder if you would have to be careful when bending them though...
__________________
No, im not ACTUALLY michael rosen, thats why i spelled it micheal... not cause i'm stupid...

638nm HL63193MG @1.2A, S1 lens, 501B, 860mW
532nm 60-160mW HL from laserbtb
515nm 29mw HL-515 laserbtb
488nm JSDU 2214-20SLMD 20mW Argon-Ion
445nm 1300mw
405nm BDR-209 16x @ 0.6A, S1 lens, 501B LED'ed

Laserbee A 2W LPM 1mw resolution.

I have a good basic understanding of DPSS and gas lasers, so if you have questions, feel free to PM me! I don't know anything about electronics though.

Last edited by micheal rosen; 09-13-2015 at 08:52 PM.
micheal rosen is offline   Reply With Quote
Old 09-14-2015, 01:14 AM #519
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
barthchris barthchris is offline
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by TaterMay View Post
I actually cut solder first, which made me decide to try out the spring. I was very surprised myself. Feel free to throw out some more ideas to attempt to burn/cut through, as I have just finished another one that hit 7.24 watts peak.


As for the copper vs aluminum argument, some will say that copper will absorb the heat away from the diode better, but won't dissipate it into air as well as aluminum. However, the rate of heat exchange is dependent largely upon the difference in temperature. Since copper has better thermal conductivity, it stands to reason that the heat exchange with air should also be greater than that of aluminum.
Yeah, I heard that argument years ago on this forum. Strange how it was said that AL will dissipate quicker than copper if all other things are considered equal, didn't compute in my feeble mind. I guess I'll just try the AL heatsinks and see how it works.

Quote:
Originally Posted by Atomicrox View Post
Steel wool, magnesium strip, charcoal and perhaps a thin copper wire. I never managed to ignite any of these with 3W.
I've tried the magnesium strips with the 3W too, no dice. But I happened to have a pile of thermite I was trying to light at the time and to my surprise the 3W does it with ease when focused! Even an A140 will do it when focused tight. Thermite is notoriously hard to light with conventional means (lighter, matches, propane torch).

Of course this diode will light thermite when focused as small as possible, but what would be cool is if it could do it when focused to infinity. That would be impressive. Although not everyone just has a pile thermite sitting around. Well, never say never, If I were a betting man I'd say more than a fair share of the members here might have some tucked away for a rainy day.

Last edited by barthchris; 09-14-2015 at 01:18 AM.
barthchris is offline   Reply With Quote
Old 09-14-2015, 01:24 AM #520
Atomicrox's Avatar
Class 3R Laser
 
Join Date: Jun 2011
Posts: 2,225
Rep Power: 9926
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Atomicrox Atomicrox is offline
Class 3R Laser
Atomicrox's Avatar
 
Join Date: Jun 2011
Posts: 2,225
Rep Power: 9926
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

I do have some Al powder and could mix up some thermite but TBH lighting that from point blank range sounds rather dangerous and I don't think the focus will allow me to get more than a meter away.

Nice find, anyways

Edit: perhaps with my 600mW 405nm. At least it's single mode.
__________________
405nm: NewWish (29.1mW avg|5mW rtd) | Dilda (81.5mW avg|200mW rtd) | 501B by Blord (633mW pk)
low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

HV: Flyback, Plasma Speaker, The Arcsynth and SSTC

Last edited by Atomicrox; 09-14-2015 at 01:26 AM.
Atomicrox is offline   Reply With Quote
Old 09-14-2015, 04:04 AM #521
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
barthchris barthchris is offline
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Believe it or not, I've done it many times at probably half a meter away with no problems at all but its on maybe a few ounces.
I can definitely understand your apprehension, some seriously hot stuff there, don't want to be the winner of a Darwin award!
Probably also depends on the iron/aluminium ratio too, as you know different amounts either way can make a difference on how quickly the reaction takes place.

EDIT Just read the last line after I posted. Yeah, try with 405! You can get back to a comfortable distance. Cant remember if I did it with mine, its has died like they always do when driven high, unless your lucky. Hopefully the energy isn't too concentrated if you know what I mean. But it should work.

Last edited by barthchris; 09-14-2015 at 04:12 AM.
barthchris is offline   Reply With Quote
Old 09-14-2015, 03:49 PM #522
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by TaterMay View Post
Since copper has better thermal conductivity, it stands to reason that the heat exchange with air should also be greater than that of aluminum.
Not with the way 90% of pointers are built around here (one solid lump)
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 09-14-2015, 03:55 PM #523
TaterMay's Avatar
Class 2 Laser
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
TaterMay TaterMay is offline
Class 2 Laser
TaterMay's Avatar
 
Join Date: May 2015
Location: Birmingham, AL
Posts: 350
Rep Power: 93
TaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond reputeTaterMay has a reputation beyond repute
Default

Quote:
Originally Posted by Cyparagon View Post
Not with the way 90% of pointers are built around here (one solid lump)
I would definitely like to see more finned sinks. I purchased a couple of finned aluminum heatsinks for my ray gun host, but they were a little smaller than I'd like. Still not sure what diode I'm putting in it though.
TaterMay is offline   Reply With Quote
Old 10-05-2015, 04:47 PM #524
Class 3R Laser
 
Join Date: Apr 2014
Location: NJ
Posts: 1,296
Rep Power: 174
Teej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond repute
Teej Teej is offline
Class 3R Laser
 
Join Date: Apr 2014
Location: NJ
Posts: 1,296
Rep Power: 174
Teej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond reputeTeej has a reputation beyond repute
Talking Re: NUBM44 6W+ 450nm Laser Diode

I think part of the confusion about heat loss/cooling our devices, is that heat LOSS for example can have 3 main avenues:

Conduction, radiation and convection.

The heat from a source needs to get TO a place it CAN be lost FROM.

So, a sink is used, typically via conduction, to get the heat to transfer to it instead...by direct contact.

As mentioned, water is a great sink material, as it takes a lot of energy to heat it.

Unfortunately, materials that can absorb a lot of heat don't tend to give it up well either...so, a sink is limited to short ENOUGH duration energy supplies, so they CAN absorb what's needed.

Once the heat is say, conducted to the sink...it has to be disposed of FROM the sink. (Or the sink ends up the same temp as the source in the device, etc...no longer cooling it...)

Now, that's where loss comes into play. If the device is in your hand, heat can be CONDUCTED from the sink to you...as one way of additional cooling.

If the heat is lost to the air, convection and radiation can be at play...with convection being the heated air carrying away that heat due to air movement, etc...

...and radiation being the heat radiated off as a function of the device's surface characteristics.


For example, a shiny silver finish is REALLY bad at radiating heat, but a flat black finish is awesome at it.

Fins, etc, increase the surface area available to lose heat through...and work best with airflow for convection cooling and as close to a flat black finish to enhance radiation losses.

Ironically, for the surfaces that you might be holding in your hand, the fins can reduce the conductive heat loss...by reducing the contact area for that loss. (Think of those desert lizards, etc, that alternate feet when on hot sand...the less contact, the less heat transfer, alternate contact allows alternate re-cooling, etc)

So, a sink is effective if it can draw off the heat from the part you need cooled, for a long enough period...and becomes progressively less effective as it's temperature rises.

So, cooling the SINK becomes the next step...and that's where people tend to get confused. Several posters mentioned aspects of this confusion, and gave explanations, but, I'm consolidating much of that here.

The factors become about the rates at which heat loss from the sink can be accomplished...and optimizing the solution to the application.

For example, if the device is held in a particular area, you would maximize conduction and worry less about convection or radiation.

If an area of the device will not get much airflow for convection, or contact for conduction, the losses might be tilted towards radiation of heat instead...and so forth.


Last edited by Teej; 10-05-2015 at 04:48 PM.
Teej is offline   Reply With Quote
Old 10-07-2015, 08:19 PM #525
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 965
Rep Power: 2311
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is online now
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 965
Rep Power: 2311
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by Teej View Post
water is a great sink material, as it takes a lot of energy to heat it.

Unfortunately, materials that can absorb a lot of heat don't tend to give it up well either...so, a sink is limited to short ENOUGH duration energy supplies, so they CAN absorb what's needed.

Once the heat is say, conducted to the sink...it has to be disposed of FROM the sink. (Or the sink ends up the same temp as the source in the device, etc...no longer cooling it...)
Hm. You are indirectly addressing an issue I am working on as well. I will try not to deviate far off the rails here.

You have a heat source. Nubm44. This heats up the copper module it is set in. That module then transfers heat to a copper "head" (heat sink host body.) through conduction.

Is it possible to say the diode at a set amperage will reach a constant max temperature and theoretically with a large enough heat sink surface area will reach a thermal equilibrium via atmosphere convection???
OR am I wrong and the diode will eventually die in a thermal runaway.

I don't have solid data here so I can't use an equation to plug the numbers in but I'm wondering if it's possible.
My specific situation is a distillation condenser that is getting way too warm on me but there are other variables here like flow rate etc. My thought process is if I have a large enough volume reservoir(disstilled water) it will eventually reach an equilibrium.
__________________
"Rosemary had an accident." TDWP


Last edited by Down with Umbrella; 10-07-2015 at 08:25 PM.
Down with Umbrella is online now   Reply With Quote
Old 10-07-2015, 08:27 PM #526
gozert's Avatar
Class 3R Laser
 
Join Date: Nov 2014
Location: Netherlands
Posts: 1,092
Rep Power: 277
gozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond repute
gozert gozert is offline
Class 3R Laser
gozert's Avatar
 
Join Date: Nov 2014
Location: Netherlands
Posts: 1,092
Rep Power: 277
gozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond reputegozert has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

Quote:
Originally Posted by Down with Umbrella View Post
Hm. You are indirectly addressing an issue I am working on as well. I will try not to deviate far off the rails here.

You have a heat source. Nubm44. This heats up the copper module it is set in. That module then transfers heat to a copper "head" (heat sink host body.) through conduction.

Is it possible to say the diode at a set amperage will reach a constant max temperature and theoretically with a large enough heat sink surface area will reach a thermal equilibrium via atmosphere convection???
OR am I wrong and the diode will eventually die in a in a thermal runaway
I think this should be possible. I've seen many lower powered diode builds with an unlimited duty cycle of which the diode would definitely burn out if not heatsinked. This concept is pretty much the same except the diode will generate far more heat than a low powered single mode diode. The question is if the copper can dissipate the heat fast enough from the diode to keep it at a steady temperature without that temperature being any higher than the diode can handle.

Not an expert by far, but this is how I'd imagine it would work.
gozert is offline   Reply With Quote
Old 10-08-2015, 12:42 AM #527
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: NUBM44 6W+ 450nm Laser Diode

I have written a bit about this topic previously, and it never changed:

You can make a continous operating laser if the thermal resistances beyond your control are not the limiting factor. The thermal resistance here is basically that from laser die to case, and to some degree from case to heatsink as you cannot increase the size of the case.

Lets take a theoretical example:

Laser thermal output: 20 watts (resonable for a 6 watt output diode)
Die-to-case: 1 K/W
case-to-heatsink: 1K/W

In this example the laser would operate 40K above ambient if set in an infinitely large heatsink. With a maximum die temperature of 70 celcius and ambient temperature of 25 celcius this would be acceptable.

But heatsinks are never infitiely large. So how big does it need to be? We have only 5K of room here to ditch 20 watts, requiring a 5/20=0.25 K/W heatsink. This would equate to a fairly big cpu heatsink with the fan running.

The die-to-case and case-to-heatsink values would probably a bit lower in practice allowing for a smaller heatsink to do the job, but you must obtain the exact values from the diodes datasheet to know. This will give you an exact figure for die-to-case, but case-to-heatsink also depends on what you do in terms of contact pressure, thermal compounds etc, so this can be a bit unpredictable.
Benm is online now   Reply With Quote
Old 10-08-2015, 05:41 AM #528
Class 1 Laser
 
Join Date: Dec 2011
Posts: 64
Rep Power: 16
ED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud of
ED KLINE ED KLINE is offline
Class 1 Laser
 
Join Date: Dec 2011
Posts: 64
Rep Power: 16
ED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud ofED KLINE has much to be proud of
Default Re: V1 445nm Laser Diode

Quote:
Originally Posted by CDBEAM777 View Post
Well...this Bad Boy is crying out for a little optical correction !!!

See the attached pic !!! I will be doing something like this !!

The flat section may need to be about 1/2" (15mm) longer ?? Dunno yet.

This unit pictured uses two C-lenses to correct the beam. Will the LD demand a 2mm collimation lens...( from Dave at LSP ) ??? Dunno ??? might...but I am betting not...my guess is that a G2....coupled with C-Lenses will do the trick !!!

Got one reserved with DTR.... Yes...I know this adaptor/C-Lens mount does not look sleek...But I assure you....It will greatly reduce the slow axis divergence and reign in a less than perfect aspect ratio...again....disclamer...not perfect...but a lot better....for those of you who care about divergence !! Pass the popcorn !! and hang on for the ride !!

Then...on to a dual...you bet !!!

Note: Thank you all for doing the break thru work on detailing the power nature of this LD !! Exciting times indeed !!! And Oh...Best to keep this " Rocket" outa yer Pocket !!! Hahahahaha
Hello. Can you tell me where you bought the two "C" lenses pictured. I would like to buy a set. Thank you for your time, Ed.
ED KLINE is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f65/nubm44-6w-450nm-laser-diode-94119.html
Posted By For Type Date
CNC Control - que lente buena para el laser? This thread Refback 08-10-2017 03:00 PM
???????? ?????? ?? ?????????? ? ?????? ? ??? ?? ?????? cnc-club.ru This thread Refback 02-14-2017 09:06 AM
?????-???????? : ???? NUBM44 This thread Refback 01-04-2017 09:06 AM
?????? This thread Refback 12-16-2016 09:46 AM
CNC build and use notes | Cavalcade of Mammals This thread Refback 05-06-2016 11:55 PM
nubm44 nichia - ??????? This thread Refback 02-10-2016 05:52 AM
nubm44- nichia - ??????? This thread Refback 02-09-2016 12:03 AM
Fingers elektrische Welt ? Thema anzeigen - Interessante und kuriose technische Bilder This thread Refback 12-21-2015 06:49 PM
New Diode This thread Refback 06-22-2015 10:22 PM










Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 08:25 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC