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 01-05-2012, 03:42 PM #1
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default How much heatsink?

If I run a 445 at 275ma's, putting out about ~75mw, how much heatsink would i need to give it a continuous duty cycle?


ColdWelder is offline   Reply With Quote







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







Old 01-05-2012, 03:51 PM #2
Mohrenberg's Avatar
Class 4 Laser
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Mohrenberg Mohrenberg is offline
Class 4 Laser
Mohrenberg's Avatar
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Default Re: How much heatsink?

try it out and see if it even needs it. If it does need heat sinking it couldn't be much.
__________________

Http://www.Budgetbeams.com
Mohrenberg is offline   Reply With Quote
Old 01-05-2012, 06:49 PM #3
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

Well, look at it this way: you are giving it 275mA, and it's putting out 75mW of light. It's probably running at around 4.3V or something like that, meaning that you are inputting 1182.5mW of power and getting out 75mW. So you are losing 1.1W to heat. Now, consider... an LOC for example. If you put in 420mA at 3V to it, you can probably expect it to output at least 250mW. However, your input is 1260mW of power, so you are only losing 1.01W in this case. However, note that, you always need a heatsink for an LOC, especially at those currents. The same should theoretically be true of a 445 - just because the current is low doesn't mean it needs less heatsinking. Because it's near threshold, it is actually extraordinarily inefficient at those currents.
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 06:50 PM #4
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

I think I will do that, but I don't have an LPM. :/ What if I just used a custom, aixiz-style copper module head for the diode? Also, Moh, any suggestions on driver type and power supply?
And thanks Wolf! That makes sense, now keep in mind, this my first 445 build, so I'm not sure how much heatsinking is appropriate for a 445. Also, if I'm running the diode this low, will it's life decreased?

Last edited by ColdWelder; 01-05-2012 at 06:59 PM. Reason: Whoops.
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 08:25 PM #5
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

No problem! Regarding heatsinking: just a normal -sized heatsink is appropriate for 445s. They can handle a lot more, so proportionately speaking, it's probably the same size heatsink as you would need for a normal red LPC, i.e. just standard, flashlight-fit heatsink. Certainly a copper module would help, it may even be enough, but I always like to be on the safe side of things.

And lifespan... no. At most, it will probably actually increase the lifespan dramatically, giving you more than 10,000 hours of use, probably.
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 08:46 PM #6
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

Well great! Can't wait to build my first blue laser. Now, as far as thermal properties go, I don't really care about burning much, but it would be nice to be able to start some steel wool for a fire-starter. Would this be possible with 75mw of 445? Or would it need to be cranked up?
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 08:47 PM #7
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

Lighting steel wool isn't easy :P You may be able to light a match with 75mW (that's iffy), but I'm not even sure if you could light steel wool with 1W of power =p
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 09:01 PM #8
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

Oh wow, okay! I thought I had heard about some of the lower power 405's igniting steel wool, I haven't tested it myself. Well, do you know of anything that makes decent laser tinder? I've seen some rocket fuel-type charges that seemed cool, it would just be nice to have a waterproof and winderproof fire starter. But, I would rather stay on the lower power end. <150mw.
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 09:09 PM #9
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

Flashpaper? I know it's sold online somewhere.
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 09:24 PM #10
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

I'll give it a shot! Thanks for the help! I need to +rep both Wolf, and Moh, I will as soon as i'm able. As for the build, i'm going to run it off of a single 16340 most likely. What driver would you suggest? It will most likely need to fit into the aixiz housing..
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 09:29 PM #11
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

Hey, no problem. Regarding driver... I would probably suggest a flexdrive - it's always a great option for a driver, and it's tiny. It's pretty expensive ($26 shipped), but it's really great.
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 10:01 PM #12
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

That's what I thought you'd say, haha. I should be using an A140 for this right?
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 10:25 PM #13
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How much heatsink?

Try an M140 - they are the diodes that most people have nowadays and they seem to be more efficient.
Wolfman29 is offline   Reply With Quote
Old 01-05-2012, 10:57 PM #14
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

Oh excellent, check. What current do you think I would need to get 100mw?
ColdWelder is offline   Reply With Quote
Old 01-05-2012, 11:04 PM #15
Mohrenberg's Avatar
Class 4 Laser
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Mohrenberg Mohrenberg is offline
Class 4 Laser
Mohrenberg's Avatar
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Default Re: How much heatsink?

you'll have to get a flex drive to power it since you're using a single 16340.

What are you putting it in? is it lab style or handheld?
__________________

Http://www.Budgetbeams.com
Mohrenberg is offline   Reply With Quote
Old 01-05-2012, 11:36 PM #16
ColdWelder's Avatar
Class 1 Laser
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
ColdWelder ColdWelder is offline
Class 1 Laser
ColdWelder's Avatar
 
Join Date: Nov 2011
Location: Utah
Posts: 65
Rep Power: 6
ColdWelder will become famous soon enough
Default Re: How much heatsink?

It's going to be handheld. I haven't decided what host yet, I bought a few of those waterproof rayfoss hosts, I think It would be pretty nice in there.
ColdWelder 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











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 08:05 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