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 > Drivers, Test-load, Power Supply, & Batteries



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



Reply
 
LinkBack Thread Tools Display Modes
Old 07-17-2015, 03:27 PM #33
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,122
Rep Power: 50946
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Class 4 Laser
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,122
Rep Power: 50946
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: making the new NUBM44 450nm diode handheld?

Even with mine having a damaged window I was getting 5 watts at 5 amps, I expect 6 or more watts when de-canned.


__________________

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

Laser Safety: http://www.laserpointersafety.com/index.html

Sam's Laser FAQ: Sam's Laser FAQ: Welcome Page

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
.........................
PhotoB****t high jacking you too? Use this link instead:
http://imgbb.com

High resolution of my avatar: https://ibb.co/fWOhXF
Alaskan is offline   Reply With Quote







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







Old 07-17-2015, 08:58 PM #34
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,806
Rep Power: 38848
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,806
Rep Power: 38848
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: making the new NUBM44 450nm diode handheld?

Quote:
Originally Posted by Alaskan View Post
Even with mine having a damaged window I was getting 5 watts at 5 amps, I expect 6 or more watts when de-canned.
I was shocked when my NUBM44 popped it's window in the first week of testing. I reproduced the result with a M-140 but I had to run it for 5 minutes plus in a flashlight host and get it pretty darn warm.... ok ok HOT! After busting the window out of that m-140 it still works fine....for now, but the window failed in it too.
I think the problem is going to be heat with these diodes and I bet they are more than fan cooled in the projectors. We don't have a spec sheet but my guess is 3 amps max on paper.
Mine was running at 5 amps and it seems that was too much. I'm going to guess that 4 amps it the safe limit for these with the window intact and no TEC because past a point any more power is just making more heat. Also as these diodes warm up the output drops and more of the power is converted to heat, especially when overdriven. Planters did a very controlled test with TEC and 4 amps is about it. If I was going to go higher then duty cycle will have to be very short unless these diodes prove to be able to last without the can/window. When I get mine back from DTR I will test it and see how long it lasts without the can, but I am going to cut it from 5 amps to 4.5.

Last edited by RedCowboy; 07-17-2015 at 09:04 PM. Reason: typo
RedCowboy is online now   Reply With Quote
Old 07-22-2015, 12:54 AM #35
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,440
Rep Power: 18210
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: 7,440
Rep Power: 18210
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: making the new NUBM44 450nm diode handheld?

Quote:
Originally Posted by Alaskan View Post
The diode is outputting part of that 25 watts as light, so it isn't ending up as heat dissipation. The way you worded part of your post seemed to indicate the heat sink would need to handle that much dissipation.
Strictly speaking you are correct: what is emitted as light does not have to be dealt with by the heatsink. But since this amount is actually quite small (25% at best) i usually advise to ignore that fact and design the thermal system to handle the full input power to the diode has heat.

But in all honesty you should over-dimension heatsinks a bit usually: their K/W performance is often rated in optimum orientation and such, which may be feasible for a device sitting on a bench, but not a portable unit. It actually does matter if the fins on a heatsink are mounted vertically or horizontally for example, but this cannot be predicted for a torch-style device in real world application.
Benm is online now   Reply With Quote
Reply

Tags
450nm, battery question, beginner, help a brother, nubm44





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











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 12:51 AM.


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