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 09-19-2008, 08:44 PM #1
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
kcscott11 kcscott11 is offline
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
Default New to this, A few questions...

Hmmm ok i want to build a laser... I know i need a host to put the laser in, the laser diode, a module, a driver, and a heat sync. I know how to put it together. I have questions on the electrical end and specs and such. Ok lets say i built my laser with the darby flashlight, a sony 16x dvd burner diode, used the fusion driver, and a heat sync for the darby, what mw would/should i expect? Am i assuming correctly that using the driver i can change the mw? is it the higher the volt output the higher the mw? What is the difference in Drive and pulse? Could I get 200 mw from this setup? and what would my on/off cycle times be? Can i use a digital voltmeter to set my output on the driver? see i have a lot of questions like this, All of the tutorials ive seen tell how to put it together, not how to set up the driver, and how to know you mw etc. thanks and responses will be appreciated


kcscott11 is offline   Reply With Quote







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







Old 09-19-2008, 08:53 PM #2
FrothyChimp's Avatar
Class 2M Laser
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
FrothyChimp FrothyChimp is offline
Class 2M Laser
FrothyChimp's Avatar
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
Default Re: New to this, A few questions...

The way a driver works for a laser diode is via current control. It's exactly the way you think about voltage circuits except backwards. In a normal voltage regulated circuit, the voltage is set and never varies. The current automatically adjusts to keep the voltage constant. With a laser diode driver, the current is set and the voltage varies to keep the current constant. The current is what you will be setting when you adjust any of the drivers. You will be able to measure the current input to the laser diode on almost all the drivers as they are built by measuring the voltage drop across a small resistor (set by the designer of the board, usually 1 ohm or similar) or you can use your own resistor on a board that doesn't have a test point. The output of the laser diode is not as cut and dried as the current input. Every diode varies a little bit and the only way to know exactly what it is doing is by using a laser power meter. Heat sinking will allow you to run the laser with a much better duty cycle but what that duty cycle is is a function of the size of the sink and the material it is made from.
__________________
The Frothy Chimp
Cynic Extraordinaire
Why yes, I am a rocket scientist

Good whiskey, fine cigars, long legged women and blues guitar.
That's what I like.

The strong shall stand, the weak shall fall by the wayside.
FrothyChimp is offline   Reply With Quote
Old 09-19-2008, 08:58 PM #3
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
kcscott11 kcscott11 is offline
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
Default Re: New to this, A few questions...

ok well i suppose my question is, how to I know how to set the driver, and where to set it?
kcscott11 is offline   Reply With Quote
Old 09-19-2008, 09:01 PM #4
FrothyChimp's Avatar
Class 2M Laser
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
FrothyChimp FrothyChimp is offline
Class 2M Laser
FrothyChimp's Avatar
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
Default Re: New to this, A few questions...

There will be a small potentiometer on the board (little square thing with a slot for a phillips screwdriver). Turning this "pot" adjusts the output of the driver. You will need a dummy load such as 3 or 4 diodes to set the current. Never run a current regulated circuit without some kind of load across the output. After it's set at the mA you want then remove the dummy load and install the laser diode. If you are using a standard driver supplied by one of the members here, they usually have instructions for setting the current included with their circuit boards.
__________________
The Frothy Chimp
Cynic Extraordinaire
Why yes, I am a rocket scientist

Good whiskey, fine cigars, long legged women and blues guitar.
That's what I like.

The strong shall stand, the weak shall fall by the wayside.
FrothyChimp is offline   Reply With Quote
Old 09-19-2008, 09:15 PM #5
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
kcscott11 kcscott11 is offline
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
Default Re: New to this, A few questions...

ok i read a tutorial that i hadnt found yet... lets just say that the diode i buy says its a 150 mw diode, what would i want my ma to be? how do you know this, are there any tutorial on this subject?
kcscott11 is offline   Reply With Quote
Old 09-19-2008, 09:27 PM #6
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
kcscott11 kcscott11 is offline
Class 1 Laser
 
Join Date: Sep 2008
Posts: 57
Rep Power: 9
kcscott11 is on a distinguished road
Default Re: New to this, A few questions...

hmm im looking at a diode data sheet and it says current max is 170, does that mean 170ma max and the operating voltage max is 3.0. are these the standards i would go buy on the diode?
kcscott11 is offline   Reply With Quote
Old 09-21-2008, 01:21 AM #7
FrothyChimp's Avatar
Class 2M Laser
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
FrothyChimp FrothyChimp is offline
Class 2M Laser
FrothyChimp's Avatar
 
Join Date: Sep 2007
Posts: 977
Rep Power: 80
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
Default Re: New to this, A few questions...

yes those are the standards. just make sure you are setting the diode to the CW output rating and not the pulsed output rating. each should be stated on the spec sheet.
__________________
The Frothy Chimp
Cynic Extraordinaire
Why yes, I am a rocket scientist

Good whiskey, fine cigars, long legged women and blues guitar.
That's what I like.

The strong shall stand, the weak shall fall by the wayside.
FrothyChimp 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 10:17 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