Old 10-09-2008, 10:46 PM #1
Junior Member
 
Join Date: Mar 2008
Posts: 19
Rep Power: 0
laserwayne has a spectacular aura aboutlaserwayne has a spectacular aura aboutlaserwayne has a spectacular aura about
laserwayne laserwayne is offline
Junior Member
 
Join Date: Mar 2008
Posts: 19
Rep Power: 0
laserwayne has a spectacular aura aboutlaserwayne has a spectacular aura aboutlaserwayne has a spectacular aura about
Default bet

alright, i know this is a stupid question but a friend of mine believes its possible to collominate an led. i dont think it is so we made a bet. so is it possible to take an led and colliminate it


laserwayne is offline   Reply With Quote


















Old 10-09-2008, 10:50 PM #2
MarioMaster's Avatar
Class 3B Laser
 
Join Date: Jul 2007
Location: Allentown, PA
Posts: 3,632
Rep Power: 310831
MarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond repute
Send a message via AIM to MarioMaster
MarioMaster MarioMaster is online now
Class 3B Laser
MarioMaster's Avatar
 
Join Date: Jul 2007
Location: Allentown, PA
Posts: 3,632
Rep Power: 310831
MarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond repute
Send a message via AIM to MarioMaster
Default Re: bet

do a quick search, there was a massive thread not long ago about this very issue

TL;DR version: no, you can't
__________________
ILT 5500KR krypton only air cooled ion 100mW 647.1nm | ILT 5500AR argon only air cooled ion >300mW multiline
Omnichrome 643 air cooled Ar/Kr ion 10mW 676.4nm 647.1nm 568.2nm 488nm 476.2nm (high hours)
Spectra Physics 127 >30mW 632.8nm HeNe | Uniphase 1.5mW 543.5nm GreeNe
Coherent Innova 90 argon ion water cooled ??W (got plasma, alignment in progress)
Coherent 60W 830nm water cooled diode brick | Shenhui Laser 40W 10600nm water cooled CO2

(9:03:50 PM) Picasso: the best guys i saw ever at burning man was two dudes dressed as all green army men shooting pants at naked guys
MarioMaster is online now   Reply With Quote
Old 10-09-2008, 11:07 PM #3
pullbangdead's Avatar
Class 3R Laser
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 28228
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
pullbangdead pullbangdead is offline
Class 3R Laser
pullbangdead's Avatar
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 28228
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
Default Re: bet

^Correct.

Light from LEDs is not coherent, therefore not able to be collimated.

What did you win in your bet?
pullbangdead is offline   Reply With Quote
Old 10-10-2008, 11:14 PM #4
Switch's Avatar
Class 3B Laser
 
Join Date: Dec 2007
Posts: 3,327
Rep Power: 2795
Switch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond repute
Switch Switch is offline
Class 3B Laser
Switch's Avatar
 
Join Date: Dec 2007
Posts: 3,327
Rep Power: 2795
Switch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond repute
Default Re: bet

Depends on what you consider collimation.Sometimes , focusing an LED with a reflector and lens is called collimation, more or less correct, but he may still argue with you. :-/
Switch is offline   Reply With Quote
Old 10-11-2008, 01:29 AM #5
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,459
Rep Power: 7374626
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: 9,459
Rep Power: 7374626
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: bet

Quote:
Collimate:

1. to bring into line; make parallel.
I somehow doubt the beams of an LED are EVER going to be even CLOSE to parallel.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 10-11-2008, 01:35 AM #6
rocketparrotlet's Avatar
Class 3R Laser
 
Join Date: Aug 2008
Location: Washington
Posts: 1,368
Rep Power: 48
rocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond repute
rocketparrotlet rocketparrotlet is offline
Class 3R Laser
rocketparrotlet's Avatar
 
Join Date: Aug 2008
Location: Washington
Posts: 1,368
Rep Power: 48
rocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond reputerocketparrotlet has a reputation beyond repute
Default Re: bet

Wish I could find that thread for you. As other people have said, even with fancy optics, it is not possible to collimate an LED because the light is not coherent like laser light. One person estimated that even with the best of optics and an extremely fancy set up, the light would not be coherent and the divergence would be at least 10 times that of a laser.

By the way, what laser is that in your avatar? It looks really cool.

-Mark
__________________
No, that wasn't sarcasm at all...

--

DON'T CLICK THIS LINK!
rocketparrotlet is offline   Reply With Quote
Old 10-11-2008, 01:38 AM #7
RA_pierce's Avatar
Class 3B Laser
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,375
Rep Power: 2496094
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
RA_pierce RA_pierce is offline
Class 3B Laser
RA_pierce's Avatar
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,375
Rep Power: 2496094
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
Default Re: bet

I've done it, but it doesn't work nearly as well as a laser.

The lens had an 8 inch focal point and was positioned about 6 inches from the LED.
The result was a 2 inch diameter dot at 25 feet, and with less than 50% of the total output of the LED.
It works, but not well.

There is no way to get a beam from a LED that can match or even come close to a laser's.

This question has been answered many times...
__________________
405nm
450nm
488nm
495nm details
508nm details
532nm
638nm details
How to build a pen
RA_pierce is offline   Reply With Quote
Old 10-11-2008, 09:21 PM #8
Zom-B's Avatar
Class 2M Laser
 
Join Date: Mar 2008
Posts: 897
Rep Power: 305066
Zom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond repute
Zom-B Zom-B is online now
Class 2M Laser
Zom-B's Avatar
 
Join Date: Mar 2008
Posts: 897
Rep Power: 305066
Zom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond reputeZom-B has a reputation beyond repute
Default Re: bet

a/b=c/d

where

a=die size, c=spot size,
b=distance from die to lens
d=distance from lens to spot

A die in a led is typically 0.2mm but if it has a round head (like standard leds) the die appears much larger and the beam actually gets much worse.
__________________
405nm 170mW module
410nm* 135mW Xtreem (PHR-803T)
448.6nm* M140 2W+ (2.34W+ with G2) MXDL [overloads my meter] (M140)
510.5nm* 88mW (103mW with G2) ("New" Sharp 505nm SB147EC91)
523.1nm* 98mW (115mW with G2) (Osram PL520)
532nm 40mW New Wish pointer (DX.com)
630nm 5.15mW stable pointer
660nm 250mW diodes (LPC-826)
808nm 145mW IR module
* = measured
Awesome adjustable lab supply
LPM: Kenometer dual range 0.001~2W
Zom-B is online now   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 03:59 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