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.


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


2.5 Watt Blue Thor M 2 Laser Pointer











Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications

List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 05-09-2016, 11:43 AM #1
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
luisonoff luisonoff is offline
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
Default Hacking a cheap laser module to get a divergent beam

My name is Luis Rodenas and this is my first post at this forum, so hello everyone.

First a few lines about my project: I am developing a small RC helicopter with a laser emitter that has to hit (with the laser beam) a static target. Rigth now I am using very cheap laser modules that I got from ebay (example picture below), they are very small (6 mm diameter), work at 3V and only have 1 plastic lens inside the copper head.

The thing is I want to get a much larger laser dot, divergent beam, in order to make it easier to hit the target while flying.



So far I achieved a 9 cm laser dot at 1 meter distance, but the dot brigthness is not uniform (half circle is darker) and I would like to get something closer to 15 cm at 1 meter distance.
I achieved this just flipping over the original lens while experimenting, no idea what kind of lens that is (collimating?) nor why it worked.

I want to do it the rigth way, so I am looking for better lenses or laser modules to match my needs. I am looking now at plano concave lenses.

My questions:
- Any idea what focal length and curvature more or less should have this plano concave lens?
- Should I keep the original lens (collimating?) and put behind the new lens? Or will it work only with the new lens?
- Do you know of any one who has worked on this matters or company doing divergent laser modules?
- Tips on how to achieve this?
- Should I better consider a high power led with a very narrow beam? Do you know if they even exist? I couldn't find narrow beam high power leds.

Lots of questions I know, but any little help or comment is much appreciated.
Thank you!


luisonoff is offline   Reply With Quote










Old 05-09-2016, 01:32 PM #2
Trendkilla254's Avatar
Dark Lord of the Sith
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2215
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Trendkilla254 Trendkilla254 is offline
Dark Lord of the Sith
Trendkilla254's Avatar
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2215
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Default Re: Hacking a cheap laser module to get a divergent beam

I'd recommend a 520nm or 515nm diode. It will be brighter and you can focus the dot size.
__________________
New to Lasers? Click Here! THIS is the thread that answers all your "Where can I..." "Is this..." "How do I..."
Laser Safety
Eye Safety First:Uvex S1933X Skyper Safety Eyewear, Black Frame, SCT-Orange UV Extreme Anti-Fog Lens
"5mw"* 405nm Gearbest Pointer - Highly Unlikely to be 5mw
5mw 445nm Custom Pointer in a former Cordless Drill "Gun Style" Host - proof of concept before going into Nerf Gun
5mw ~515nm Bladed LightSaber Osram pl515 with "Growing Blade" Video attached (Host by Ehgemus)
5mw 532nm Pointer Broken? After months of no use it works now... can't explain.
5mw 685nm from 10fenny in Pen Host - Link - Broke Driver taking it apart
Graveyard
0mw 450nm Osram PL-450 RIP 11/25/2015
Two Laserlands 5mw 445nm Pens

Communication methods: Xbox Live\Skype\Steam\Gmail\Google Plus\Youtube - Trendkilla254
Trendkilla254 is offline   Reply With Quote
Old 05-09-2016, 04:39 PM #3
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
luisonoff luisonoff is offline
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
Default Re: Hacking a cheap laser module to get a divergent beam

Thanks for the tip! At first I was also looking for green lasers since they were supposed to be brigther at same output power, but I couldn't find any cheap module or diode. Do you know of any?

What do you mean with "you can focus the dot size"? Isn't that something independent of the wavelength used?
luisonoff is offline   Reply With Quote
Old 05-09-2016, 04:46 PM #4
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,319
Rep Power: 9125
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,319
Rep Power: 9125
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: Hacking a cheap laser module to get a divergent beam

Quote:
Originally Posted by luisonoff View Post
Thanks for the tip! At first I was also looking for green lasers since they were supposed to be brigther at same output power, but I couldn't find any cheap module or diode. Do you know of any?

What do you mean with "you can focus the dot size"? Isn't that something independent of the wavelength used?

Depends how you define cheap - they are never going to be as cheap as those little red modules you've got. eBay should have plenty of green modules though. A whole bunch come up if you search "Green Laser Module" there. Someone else may have a better source - things can be hit or miss with eBay.

Yes - it is independent of wavelength. But chances are if you are buying a 515nm or 520nm module that it'll be in an Aixiz housing which has an adjustable focus unlike some of those really cheap red modules. I think that's what he was getting at... I could be wrong
__________________


445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | For Review Awaiting arrival
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD.850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<

diachi is online now   Reply With Quote
Old 05-10-2016, 09:24 AM #5
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
luisonoff luisonoff is offline
Junior Member
 
Join Date: May 2016
Posts: 3
Rep Power: 0
luisonoff is on a distinguished road
Default Re: Hacking a cheap laser module to get a divergent beam

Thank you diachi for the extra explanation.
I just searched on Ebay and found some USD10 green laser modules, which is 100x more expensive than the red ones, but ok.
My concern is that every green laser I find is larger in size and higher power (30mW) than the ones I am looking for.
I need a laser module or standalone laser diode that is small, something like 6mm diameter, and very low power, 5-10 mW max. Then I guess if I get this small ones, they wont come with that Aixiz housing that enable to enlarge the dot, so I have to look for another solution to get the 15cm diameter dot at 1 meter distance that I am looking for.
Any extra ideas anyone??
luisonoff is offline   Reply With Quote
Old 05-10-2016, 02:21 PM #6
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,319
Rep Power: 9125
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,319
Rep Power: 9125
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: Hacking a cheap laser module to get a divergent beam

Quote:
Originally Posted by luisonoff View Post
Thank you diachi for the extra explanation.
I just searched on Ebay and found some USD10 green laser modules, which is 100x more expensive than the red ones, but ok.
My concern is that every green laser I find is larger in size and higher power (30mW) than the ones I am looking for.
I need a laser module or standalone laser diode that is small, something like 6mm diameter, and very low power, 5-10 mW max. Then I guess if I get this small ones, they wont come with that Aixiz housing that enable to enlarge the dot, so I have to look for another solution to get the 15cm diameter dot at 1 meter distance that I am looking for.
Any extra ideas anyone??

In that case you'd probably need to use an external lens to expand the beam. I'm not aware of any 532nm modules that small unfortunately and I haven't seen any 520nm modules at that size either - although I'm sure the latter would be doable.
__________________


445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | For Review Awaiting arrival
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD.850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<

diachi is online now   Reply With Quote
Old 05-10-2016, 02:29 PM #7
Trendkilla254's Avatar
Dark Lord of the Sith
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2215
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Trendkilla254 Trendkilla254 is offline
Dark Lord of the Sith
Trendkilla254's Avatar
 
Join Date: Mar 2015
Location: Troy, Texas
Posts: 873
Rep Power: 2215
Trendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond reputeTrendkilla254 has a reputation beyond repute
Send a message via Skype™ to Trendkilla254
Default Re: Hacking a cheap laser module to get a divergent beam

I'm sorry if I was not clear.

I mean buy the pl515 osram diode for about 20 bucks. Put it in a module or have someone else do it. Yes the color is independent of the ability to focus it. It is a function of the lens and module. Find someone on here with an LPM. Bribe them or ask them nicely if they will mount the diode in the module and test it on the LPM to get the mA you need to run the diode at for your 5mw. Once you have that number, buy a driver or build one yourself. Put it all together and you have what you need. Is it more expensive? Yup.
__________________
New to Lasers? Click Here! THIS is the thread that answers all your "Where can I..." "Is this..." "How do I..."
Laser Safety
Eye Safety First:Uvex S1933X Skyper Safety Eyewear, Black Frame, SCT-Orange UV Extreme Anti-Fog Lens
"5mw"* 405nm Gearbest Pointer - Highly Unlikely to be 5mw
5mw 445nm Custom Pointer in a former Cordless Drill "Gun Style" Host - proof of concept before going into Nerf Gun
5mw ~515nm Bladed LightSaber Osram pl515 with "Growing Blade" Video attached (Host by Ehgemus)
5mw 532nm Pointer Broken? After months of no use it works now... can't explain.
5mw 685nm from 10fenny in Pen Host - Link - Broke Driver taking it apart
Graveyard
0mw 450nm Osram PL-450 RIP 11/25/2015
Two Laserlands 5mw 445nm Pens

Communication methods: Xbox Live\Skype\Steam\Gmail\Google Plus\Youtube - Trendkilla254
Trendkilla254 is offline   Reply With Quote
Reply

Tags
cheap module, divergent beam





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












Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 08:28 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