Old 10-19-2007, 03:38 AM #1
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
zerafiel zerafiel is offline
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
Default Focus mod for green lasers: some questions

So is there anything I need to know to do a focus mod for a 532nm laser or can I just take an already collimated laser and...

slap 2 lenses in front
center the beam on the lenses
align the lenses at ~2f
make one of the lenses adjustable

Is this all there is to it?

Some questions...

What sort of lenses are recommended?
Plano-concave?
Can I just use the plastic lenses from Aixiz housings?
Or are they only coated for 650nm?
How about Aixiz glass lenses?

Any help would be appreciated.


zerafiel is offline   Reply With Quote


















Old 10-19-2007, 05:41 AM #2
o_DEATH_ANG3L_o's Avatar
Class 2M Laser
 
Join Date: Sep 2007
Location: United States
Posts: 634
Rep Power: 30
o_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant future
o_DEATH_ANG3L_o o_DEATH_ANG3L_o is offline
Class 2M Laser
o_DEATH_ANG3L_o's Avatar
 
Join Date: Sep 2007
Location: United States
Posts: 634
Rep Power: 30
o_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant futureo_DEATH_ANG3L_o has a brilliant future
Default Re: Focus mod for green lasers: some questions

Depends on what you are trying to do here. If you are trying to get a nice tight beam to burn stuff, and you dont care about carrying a magnifying glass around then just use that. :P
o_DEATH_ANG3L_o is offline   Reply With Quote
Old 10-19-2007, 05:47 AM #3
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
zerafiel zerafiel is offline
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
Default Re: Focus mod for green lasers: some questions

The idea is to make a module attached to the laser. So a magnifying glass is kinda big and unsteady. Besides I can get the same effect using a lens cap set which I have. Just that the focal length is fixed and irritatingly near.
zerafiel is offline   Reply With Quote
Old 10-19-2007, 06:22 AM #4
Gazoo's Avatar
Class 3B Laser
 
Join Date: Jun 2007
Location: Dallas Tx
Posts: 3,199
Rep Power: 1335
Gazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond repute
Gazoo Gazoo is offline
Class 3B Laser
Gazoo's Avatar
 
Join Date: Jun 2007
Location: Dallas Tx
Posts: 3,199
Rep Power: 1335
Gazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond reputeGazoo has a reputation beyond repute
Default Re: Focus mod for green lasers: some questions

I have no idea how well this lens would work, but optotronics has a 6mm diameter 4000mm focal length lens.

Go here and scroll down... :P

http://optotronics.com/optics_kit.php
Gazoo is offline   Reply With Quote
Old 10-19-2007, 07:21 AM #5
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
zerafiel zerafiel is offline
Class 2 Laser
 
Join Date: Aug 2007
Posts: 422
Rep Power: 12
zerafiel is on a distinguished road
Default Re: Focus mod for green lasers: some questions

Thanks for the link. hmm 4meter double convex could be very useful but the optotronics site doesn't say anything about the material or if it is AR coated.

I think I will go with a Galilean beam expander design with a fixed plano concave and adjustable convex/plano-convex lens

Maybe nova's -8mm plano concave + a 26mm meniscus from nova might give me a 3x beam expander

other options 30mm plano convex from nova
or 35mm double convex from opto (don't think I'll spend up to $25 though)
zerafiel 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


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


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC