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 02-26-2013, 05:40 AM #1
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Mutad0r Mutad0r is offline
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Default How not to destroy my laser?

I bought this: Industrial Lab 3VDC 532nm Green Beam Laser Lazer 30mW Diode Module | eBay

It just arrived and I decided to go over the ebay page again, just in case..

Then I noticed this sentence:
Quote:
The best working method is 40 seconds continuously working and 15 seconds resting. Otherwise the laser may be burnt.
The laser is meant to be used continiously in my application, how big is the danger of burning the laser? Would it help if I used a LITTLE less than 3V, and maybe added a heatsink and a small fan?


Mutad0r is offline   Reply With Quote







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







Old 02-26-2013, 05:45 AM #2
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: How not to destroy my laser?

Use exactly 3V, adding a heatsink and fan will allow for a continuous duty cycle if the airflow and surface area of the heatsink is enough. (If it gets warm turn it off)

Remember to heatsink the driver as well.
ARG is offline   Reply With Quote
Old 02-26-2013, 05:49 AM #3
Cube777's Avatar
Class 2 Laser
 
Join Date: Jul 2012
Location: Pretoria, South Africa
Posts: 433
Rep Power: 28
Cube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond repute
Cube777 Cube777 is offline
Class 2 Laser
Cube777's Avatar
 
Join Date: Jul 2012
Location: Pretoria, South Africa
Posts: 433
Rep Power: 28
Cube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond reputeCube777 has a reputation beyond repute
Default Re: How not to destroy my laser?

30mW shouldn't be a problem running continiously, I can't open the eBay page right now but if there is any type of heatsink at all there shouldn't be a problem. On Lazerer there is a 100mW 532nm module that has no heatsink an it can be left on for one minute!

EDIT: ARG you beat me to it :P
__________________
Q:Would you rather have a laser or a Lamborghini?
A:Laser

Q:Why?????
A:Cause a Lambo can't move 299 792 458 m/s through the air

Last edited by Cube777; 02-26-2013 at 05:52 AM.
Cube777 is offline   Reply With Quote
Old 02-26-2013, 08:13 AM #4
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Mutad0r Mutad0r is offline
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Default Re: How not to destroy my laser?

Well, I just measured its current usage at 2.9V, and it's 320 mA, so I guess the 30mW is an estimate power after the crystal?, by my calculations, the laser uses almost 1W, does that mean the infrared one inside is a 1W one?
Mutad0r is offline   Reply With Quote
Old 02-26-2013, 04:52 PM #5
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: How not to destroy my laser?

Your laser diode is probably a 300mW, the other 700mW being drawn is released as heat in the driver/diode. Then the 300mW is pumped into the crystals and you get about 30mW out after the crystals.
ARG is offline   Reply With Quote
Old 02-27-2013, 09:36 AM #6
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Mutad0r Mutad0r is offline
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Default Re: How not to destroy my laser?

Ok, OH, and as for turning it off when it gets warm; is there a specific temperature range that shouldn't be exceded, my microcontroller has some free pins, I could add a thermometer and include an automatic shutdown in the code once a specific temperature is met.


EDIT:
actually, nevermind I think.. on the ebay: "+15 ~+35 centigrade", but maybe 30-33 centigrade as a turnoff point just in case?

Last edited by Mutad0r; 02-27-2013 at 09:38 AM.
Mutad0r is offline   Reply With Quote
Old 02-27-2013, 09:47 AM #7
baharini's Avatar
Class 1 Laser
 
Join Date: Jun 2010
Location: George, South Africa
Posts: 67
Rep Power: 11
baharini is a jewel in the roughbaharini is a jewel in the roughbaharini is a jewel in the roughbaharini is a jewel in the rough
baharini baharini is offline
Class 1 Laser
baharini's Avatar
 
Join Date: Jun 2010
Location: George, South Africa
Posts: 67
Rep Power: 11
baharini is a jewel in the roughbaharini is a jewel in the roughbaharini is a jewel in the roughbaharini is a jewel in the rough
Default Re: How not to destroy my laser?

Just add a large heatsink and it should be fine. Adding a fan is also a good idea, which should turn out great. In my build (My first build: Red lab laser ~250mW from DVD Burner) I added a heatsink and fan (read the update at the bottom of the page) and it can run indefinitely. And that's at 250mW.
__________________
Greetings from South Africa

My lasers:
~250mW 650nm Red (from DVD burner), lab style (click to view post)
~260mW (650nm+532nm) DIY Yellow Laser Build (click to view post)
10mW 532nm Green pointer ('ebay' pen type)
Planning: 405nm PHR-803t blu-ray laser
An assortment of cheapo 5mW red laser pens, modules, ect..
baharini is offline   Reply With Quote
Old 02-28-2013, 02:33 AM #8
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: How not to destroy my laser?

Quote:
Originally Posted by Mutad0r View Post
Well, I just measured its current usage at 2.9V, and it's 320 mA, so I guess the 30mW is an estimate power after the crystal?, by my calculations, the laser uses almost 1W, does that mean the infrared one inside is a 1W one?
2.9V is fine. 1V is lost in the regulator and the pump diode is somewhere around 40-50% efficient. Lasers are rated on their output power, not input power, so this will likely be a 200-300mW pump. The rest is lost in the conversion to green (and expander).

Duty cycle is copy pasta among Chinese vendors. They do no testing on this - it's a made-up value. You'll be fine running a low power device like this indefinitely.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 02-28-2013, 06:05 AM #9
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Mutad0r Mutad0r is offline
Junior Member
 
Join Date: Feb 2013
Posts: 6
Rep Power: 0
Mutad0r is on a distinguished road
Default Re: How not to destroy my laser?

Quote:
Originally Posted by Cyparagon View Post
2.9V is fine. 1V is lost in the regulator and the pump diode is somewhere around 40-50% efficient. Lasers are rated on their output power, not input power, so this will likely be a 200-300mW pump. The rest is lost in the conversion to green (and expander).

Duty cycle is copy pasta among Chinese vendors. They do no testing on this - it's a made-up value. You'll be fine running a low power device like this indefinitely.
Thanks!
Mutad0r is offline   Reply With Quote
Old 02-28-2013, 06:22 AM #10
HitShane's Avatar
Class 2M Laser
 
Join Date: Nov 2012
Location: Saint Petersburg, FL USA
Posts: 693
Rep Power: 55
HitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond repute
HitShane HitShane is offline
Class 2M Laser
HitShane's Avatar
 
Join Date: Nov 2012
Location: Saint Petersburg, FL USA
Posts: 693
Rep Power: 55
HitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond reputeHitShane has a reputation beyond repute
Default Re: How not to destroy my laser?

So, only 60mw green pens lose power as they get warm and crash fast?

When its not the batteries dropping... Fresh change does not matter, heat does...
__________________


----X Light Amplification by Stimulated Emission of Radiation X----


Last edited by HitShane; 02-28-2013 at 06:23 AM.
HitShane 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 04:58 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