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 > Optics



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



Reply
 
LinkBack Thread Tools Display Modes
Old 07-11-2011, 06:54 AM #1
Dawinzi's Avatar
Class 2 Laser
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Dawinzi Dawinzi is offline
Class 2 Laser
Dawinzi's Avatar
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Default How to get the focal point close to the lens ?

After almost two hours research i'm still not brighter then befor.
I'm sure there is already written something about that, so please don't freak out. Just guide me nicely to the helping Thread. Thank you.


__________________
---------------------------------------------
Fantasy is endless. Knowledge is limited.
---------------------------------------------
- 405 Rayfoss 300mW
- 405 Aurora 440mW ( broken )

- 445 JayGuin "Razor Lazor" 660mW
- 445 Sci-fi Laser 1W
- 445 Chrome Mini 1.1W
- 445 Yobresal 500mW
- 445 Yobresal 1.2 W
- 445 Ehgemus/DTR 2X32650 Sandblasted Host 1.9W
- 445 DTR Compact Stainless Steel RL-118/1.5W
- 445 DTR RL-168 Compact 14500 Host 1.6W
- 447 Dragonlaser Spartan 1W

- 532 Optotronics 127mW
- 532 Penstyle 50mW
- 532 O-like Gatlin 200mW
- 532 Jetlaser 270mW

- 635 Anselm Build 40mW
- 646 Logitech Laser Mouse
- 650 DX Pointer 50mW
- 650 "cute" o-like 300mW ( broken )
- 660 Rayfoss 200mW
Sold
- Laserpod Galaxy
- 532 Keychain 30mW
Dawinzi is offline   Reply With Quote







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







Old 07-11-2011, 07:04 AM #2
Mohrenberg's Avatar
Class 4 Laser
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Mohrenberg Mohrenberg is offline
Class 4 Laser
Mohrenberg's Avatar
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Default Re: How to get the focal point close to the lens ?

....unscrew the lens as far as it goes without falling out. I'm assuming you want the apex close to the lens for burning?
or perhaps i misunderstood the question.
__________________

Http://www.Budgetbeams.com

Last edited by Mohrenberg; 07-11-2011 at 07:05 AM.
Mohrenberg is offline   Reply With Quote
Old 07-11-2011, 07:29 AM #3
Dawinzi's Avatar
Class 2 Laser
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Dawinzi Dawinzi is offline
Class 2 Laser
Dawinzi's Avatar
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

You got it right Mo. I unscrewed the Lens but i need the Focus closer to the Lens. About 10-15 mm would be perfect.
__________________
---------------------------------------------
Fantasy is endless. Knowledge is limited.
---------------------------------------------
- 405 Rayfoss 300mW
- 405 Aurora 440mW ( broken )

- 445 JayGuin "Razor Lazor" 660mW
- 445 Sci-fi Laser 1W
- 445 Chrome Mini 1.1W
- 445 Yobresal 500mW
- 445 Yobresal 1.2 W
- 445 Ehgemus/DTR 2X32650 Sandblasted Host 1.9W
- 445 DTR Compact Stainless Steel RL-118/1.5W
- 445 DTR RL-168 Compact 14500 Host 1.6W
- 447 Dragonlaser Spartan 1W

- 532 Optotronics 127mW
- 532 Penstyle 50mW
- 532 O-like Gatlin 200mW
- 532 Jetlaser 270mW

- 635 Anselm Build 40mW
- 646 Logitech Laser Mouse
- 650 DX Pointer 50mW
- 650 "cute" o-like 300mW ( broken )
- 660 Rayfoss 200mW
Sold
- Laserpod Galaxy
- 532 Keychain 30mW

Last edited by Dawinzi; 07-11-2011 at 07:30 AM.
Dawinzi is offline   Reply With Quote
Old 07-11-2011, 12:45 PM #4
Ashortdude's Avatar
Junior Member
 
Join Date: Mar 2011
Location: space
Posts: 19
Rep Power: 0
Ashortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of light
Ashortdude Ashortdude is offline
Junior Member
Ashortdude's Avatar
 
Join Date: Mar 2011
Location: space
Posts: 19
Rep Power: 0
Ashortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of light
Default Re: How to get the focal point close to the lens ?

Quote:
Originally Posted by Dawinzi View Post
You got it right Mo. I unscrewed the Lens but i need the Focus closer to the Lens. About 10-15 mm would be perfect.
do you have any another lenses?
__________________
...

Last edited by Ashortdude; 07-11-2011 at 12:57 PM.
Ashortdude is offline   Reply With Quote
Old 07-11-2011, 01:09 PM #5
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

Focusing distance is related to magnification (and FL) of lenses ..... for obtain a focused dot very near the lens, you need a lens with high magnification and short FL, like single-element lenses ..... as alternative, you need to use a second positive lens, for increase the magnification of the lens assembly and shorter the FL.

I'm not at home at the momentand cannot post pics, sorry.
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 07-11-2011, 01:49 PM #6
Ashortdude's Avatar
Junior Member
 
Join Date: Mar 2011
Location: space
Posts: 19
Rep Power: 0
Ashortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of light
Ashortdude Ashortdude is offline
Junior Member
Ashortdude's Avatar
 
Join Date: Mar 2011
Location: space
Posts: 19
Rep Power: 0
Ashortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of lightAshortdude is a glorious beacon of light
Default Re: How to get the focal point close to the lens ?

Quote:
Originally Posted by HIMNL9 View Post
Focusing distance is related to magnification (and FL) of lenses ..... for obtain a focused dot very near the lens, you need a lens with high magnification and short FL, like single-element lenses ..... as alternative, you need to use a second positive lens, for increase the magnification of the lens assembly and shorter the FL.

I'm not at home at the momentand cannot post pics, sorry.
reading my mind ey
__________________
...
Ashortdude is offline   Reply With Quote
Old 07-11-2011, 02:50 PM #7
Dawinzi's Avatar
Class 2 Laser
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Dawinzi Dawinzi is offline
Class 2 Laser
Dawinzi's Avatar
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

Quote:
Originally Posted by HIMNL9 View Post
Focusing distance is related to magnification (and FL) of lenses ..... for obtain a focused dot very near the lens, you need a lens with high magnification and short FL, like single-element lenses ..... as alternative, you need to use a second positive lens, for increase the magnification of the lens assembly and shorter the FL.

I'm not at home at the momentand cannot post pics, sorry.

Do you mean something like that?

Blue Laser Collimating Aspheric Lenses - Edmund Optics
__________________
---------------------------------------------
Fantasy is endless. Knowledge is limited.
---------------------------------------------
- 405 Rayfoss 300mW
- 405 Aurora 440mW ( broken )

- 445 JayGuin "Razor Lazor" 660mW
- 445 Sci-fi Laser 1W
- 445 Chrome Mini 1.1W
- 445 Yobresal 500mW
- 445 Yobresal 1.2 W
- 445 Ehgemus/DTR 2X32650 Sandblasted Host 1.9W
- 445 DTR Compact Stainless Steel RL-118/1.5W
- 445 DTR RL-168 Compact 14500 Host 1.6W
- 447 Dragonlaser Spartan 1W

- 532 Optotronics 127mW
- 532 Penstyle 50mW
- 532 O-like Gatlin 200mW
- 532 Jetlaser 270mW

- 635 Anselm Build 40mW
- 646 Logitech Laser Mouse
- 650 DX Pointer 50mW
- 650 "cute" o-like 300mW ( broken )
- 660 Rayfoss 200mW
Sold
- Laserpod Galaxy
- 532 Keychain 30mW
Dawinzi is offline   Reply With Quote
Old 07-12-2011, 08:19 AM #8
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

^ high prices, but basically yes ..... now i'm at home and can post a pic, maybe it's more clear this way, than with my bad English



Basically, imagine a lens just as a device that bend light with a certain angle ..... more the lens is magnificating, more the angle is big ..... and the angle don't change, when you displace the lens (i know this is not totally true, is just for try to simplify how it work )

Now, with a lens of, say, 10mm, you must place the light source at 10mm for have a parallel beam, cause this is the "turning angle" ..... if you want to get the focusing point close to the lens, you need to place the lens far from the light source (in our case, the LD chip), and there is a limit about this, due to the "large turning angle" of this lens, as in the first diagram.

Now, imagine to have a 1mm FL lens ..... the "turning angle" is bigger, so for close the focal point to the lens, you need to place less far the lens from the light source than with the previous lens.

Ofcourse, laws of phisics cannot be broken, so with a single lens, these is a phisical limit that you cannot overcome (the approaching rate of the focusing point is not linear, and for reach the LF distance, you need to place the light source at infinite distance, so the focusing point can NEVER be close than the FL ..... in fact, much far than this) ..... for do this, you need to add a second lens, that change the optical parameters of all the assembly.

(Sorry to the opticians presents, i know it's not totally correct, the draw is just to give an idea about it, i don't think this need formulas )
Attached Thumbnails
How to get the focal point close to the lens ?-focusing-distances.jpg  
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 07-12-2011, 01:19 PM #9
Dawinzi's Avatar
Class 2 Laser
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Dawinzi Dawinzi is offline
Class 2 Laser
Dawinzi's Avatar
 
Join Date: Sep 2009
Location: Zürich, Switzerland
Posts: 446
Rep Power: 179
Dawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond reputeDawinzi has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

Thank you for that man.
I just wonder if its no Lens at the market wich is adjustable for 445nm.
__________________
---------------------------------------------
Fantasy is endless. Knowledge is limited.
---------------------------------------------
- 405 Rayfoss 300mW
- 405 Aurora 440mW ( broken )

- 445 JayGuin "Razor Lazor" 660mW
- 445 Sci-fi Laser 1W
- 445 Chrome Mini 1.1W
- 445 Yobresal 500mW
- 445 Yobresal 1.2 W
- 445 Ehgemus/DTR 2X32650 Sandblasted Host 1.9W
- 445 DTR Compact Stainless Steel RL-118/1.5W
- 445 DTR RL-168 Compact 14500 Host 1.6W
- 447 Dragonlaser Spartan 1W

- 532 Optotronics 127mW
- 532 Penstyle 50mW
- 532 O-like Gatlin 200mW
- 532 Jetlaser 270mW

- 635 Anselm Build 40mW
- 646 Logitech Laser Mouse
- 650 DX Pointer 50mW
- 650 "cute" o-like 300mW ( broken )
- 660 Rayfoss 200mW
Sold
- Laserpod Galaxy
- 532 Keychain 30mW
Dawinzi is offline   Reply With Quote
Old 07-12-2011, 05:57 PM #10
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: How to get the focal point close to the lens ?

Don't know specifically for 445nm, but for the band 400 - 500nm i think yes ..... also, if you really need the burning spot very near the lens, is better to use an add-on lens in the front of the first lens assembly, also for another reason ..... pulling the lens far from the LD chip, you take the burning point near the front of the lens, but at a certain distance, part of the light from the LD fall outside the lens, and you loose power with that ..... instead, using the main lens for focus, like, parallel beam, then a second lens for re-focus the beam close to it, you still loose a bit of power, but less than before.
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.

Last edited by HIMNL9; 07-12-2011 at 05:57 PM.
HIMNL9 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 12:11 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