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 > Tutorials, Help & Repairs



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



Reply
 
LinkBack Thread Tools Display Modes
Old 05-15-2010, 08:20 PM #1
mickatcol's Avatar
Junior Member
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
mickatcol mickatcol is offline
Junior Member
mickatcol's Avatar
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
Default Duty Cycles Help

Ok, This is my first help post.

How do you workout the Duty Cycle of a Laser?

Lets say I had a Red (LPC-815) running at 360mA (220mw~) in a Aixiz module.
Then I take the same LPC-815 in a Aixiz module at 360mA and mount it in a Lab type heat sink.

What factors do I need to know, To workout a Duty Cycle?


Thanks


<--Mick-->


mickatcol is offline   Reply With Quote







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







Old 05-15-2010, 08:42 PM #2
Grix's Avatar
Class 3R Laser
 
Join Date: Dec 2008
Location: Norway
Posts: 2,201
Rep Power: 3766
Grix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond repute
Grix Grix is online now
Class 3R Laser
Grix's Avatar
 
Join Date: Dec 2008
Location: Norway
Posts: 2,201
Rep Power: 3766
Grix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond repute
Default Re: Duty Cycles Help

There are so many variables that you cannot know exactly. People just work out a rough estimate from the size of the heatsink to the current.

A LPC @ 360mA in a proper lab heatsink would have a very long duty cycle, you could leave it on for at least 10 minutes easily.
Grix is online now   Reply With Quote
Old 05-16-2010, 09:37 AM #3
mickatcol's Avatar
Junior Member
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
mickatcol mickatcol is offline
Junior Member
mickatcol's Avatar
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
Default Re: Duty Cycles Help

I want to use it in a Laser show.
So what would it take to run it say 1-2 hours.
Would it have to be TEC cooled?

I am going to be using analogue modulation for colour mixing, So its not going to be running at Full 360mA all the time.

I just don't want to cook it.

Thanks
__________________
<--Mick-->
mickatcol is offline   Reply With Quote
Old 05-16-2010, 10:02 AM #4
hugo999999's Avatar
Class 2 Laser
 
Join Date: Feb 2010
Location: Australia
Posts: 443
Rep Power: 11
hugo999999 has a spectacular aura abouthugo999999 has a spectacular aura abouthugo999999 has a spectacular aura about
hugo999999 hugo999999 is offline
Class 2 Laser
hugo999999's Avatar
 
Join Date: Feb 2010
Location: Australia
Posts: 443
Rep Power: 11
hugo999999 has a spectacular aura abouthugo999999 has a spectacular aura abouthugo999999 has a spectacular aura about
Default Re: Duty Cycles Help

in my opinion an lpc would be fine in a large heatsink with a fan, especially at 360ma
__________________
<300mw red 660nm labby
<5mw quad red

<10mw green dx
<100mw 405nm phr803t
<200mw GGW-H20L
4 mirror RG spirograph
<5mw and <150mw 780nm
>900mw 445nm labby
hugo999999 is offline   Reply With Quote
Old 05-16-2010, 10:33 AM #5
Grix's Avatar
Class 3R Laser
 
Join Date: Dec 2008
Location: Norway
Posts: 2,201
Rep Power: 3766
Grix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond repute
Grix Grix is online now
Class 3R Laser
Grix's Avatar
 
Join Date: Dec 2008
Location: Norway
Posts: 2,201
Rep Power: 3766
Grix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond reputeGrix has a reputation beyond repute
Default Re: Duty Cycles Help

I would lower the current a tad just to be sure.
Grix is online now   Reply With Quote
Old 05-16-2010, 10:22 PM #6
mickatcol's Avatar
Junior Member
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
mickatcol mickatcol is offline
Junior Member
mickatcol's Avatar
 
Join Date: May 2010
Location: England
Posts: 17
Rep Power: 0
mickatcol is on a distinguished road
Default Re: Duty Cycles Help

Ile just run it and see what happens.

Thanks
__________________
<--Mick-->
mickatcol is offline   Reply With Quote
Old 05-16-2010, 11:33 PM #7
rkcstr's Avatar
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,368
Rep Power: 142
rkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond repute
rkcstr rkcstr is offline
Class 3R Laser
rkcstr's Avatar
 
Join Date: Dec 2007
Posts: 1,368
Rep Power: 142
rkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond reputerkcstr has a reputation beyond repute
Default Re: Duty Cycles Help

Nothing better than experimentation. Get your heatsink you want, put your laser together how you intend to use it, then turn it on and leave it go. Stick around for the first minute, see if the heatsink gets warm. If not, check back in another minute. If not, check back in a few minutes. Then 10 minutes, 20 minutes, etc. Depending on the size of your heatsink, after probably 10 minutes of being on, if it isn't hot, I doubt it will ever get warm unless you change variables like airflow, current, ambient temp, etc.

BTW, ideally, the heatsink should stay about room temp. Highest, slightly warm to the touch. That's probably conservative, but I would bet you your diode likely won't die for a very long time. If you're getting very warm with operation, either you need forced cooling (fan, TEC, etc) or just a bigger heatsink.
__________________
Laser drivers and Test Loads - rkcstr.com

Enter discount code "LPF" during checkout to save 10% off of the regular prices!

Last edited by rkcstr; 05-16-2010 at 11:39 PM.
rkcstr 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 05:05 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