Old 11-15-2011, 03:00 AM #1
Junior Member
 
Join Date: Nov 2011
Posts: 2
Rep Power: 0
lysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to all
lysozymes lysozymes is offline
Junior Member
 
Join Date: Nov 2011
Posts: 2
Rep Power: 0
lysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to all
Default 20mW green laser out of focus

Hi guys,

I got a 20mW green laser from ThinkGeek several years ago.

The laser worked great, with several km range. Great for showing constellations to my nephews.

The green laser has suddenly become a a big smear across the wall instead of the green dot. Is the diod displaced?

Any tips on how to realign the diode? I recently moved to Singapore from Sweden, so the laser could have gotten a bumpy ride in my luggage.

Thanks!


lysozymes is offline   Reply With Quote


















Old 11-15-2011, 04:29 AM #2
rocket689's Avatar
Class 3R Laser
 
Join Date: Dec 2010
Location: Oley, Pennsylvania
Posts: 1,149
Rep Power: 65
rocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond repute
rocket689 rocket689 is offline
Class 3R Laser
rocket689's Avatar
 
Join Date: Dec 2010
Location: Oley, Pennsylvania
Posts: 1,149
Rep Power: 65
rocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond reputerocket689 has a reputation beyond repute
Default Re: 20mW green laser out of focus

First thing I would try is be focusing the lens. Most 532nm lasers have the lens threaded. Sometimes this gets turned and makes a big dot instead of a small one.

If the IR pump diode was mis-aligned, it would most likely not emit any green at all.

Edit: Another thought is to check if there are any smudges on the lens...
__________________
Would you like to purchase some M-140 445nm diodes (individual or pressed into Aixiz or pure copper module) at very reasonable prices? PM me if you are interested!

My laser list has become way too big; I'm listing some of my favorites out of my extensive collection.
615mw 405nm/12X Spiderfire X-03
148mw 405nm/GGW in my "Hotlight-Saber" host
1920mw 445nm River Rock custom
1530mw 445nm Yobresal
1360mw 445nm Qumefox Sipik
800mw 445nm WL Arctic Spyder S3
240mw 473nm CNI Labby
8mw 473nm CNI Labby
528mw 532nm Lazerer Cannon
310mw 532nm Firedragon III
300mw 532nm CNI Labby
180mw 532nm SKY Laser
4x 147-267mw 532nm Waterproof
900mw 635nm in Temporary Finned Labby Sink
Several 635nm diodes awaiting a build
500mw 650nm Dual LPC-826 Labby
251mw 650nm/LPC-815 Ultrafire U-501B
Several 685nm diodes awaiting a build
3W 808nm diode awaiting build

Kenometer w/ Coherent Thermopile 10W
LaserBee 2.5W USB LPM
Radiant Alpha 2W LPMSOLD=Now in Kuwait!
1.2W RGB Projector; JNM Wide Sky Galvos (Made in Germany); Laser Show Express; Arduino-based DAC

Last edited by rocket689; 11-15-2011 at 04:30 AM.
rocket689 is offline   Reply With Quote
Old 11-15-2011, 09:53 AM #3
Flaminpyro's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,462
Rep Power: 26216
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Flaminpyro Flaminpyro is offline
Class 4 Laser
Flaminpyro's Avatar
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,462
Rep Power: 26216
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Default Re: 20mW green laser out of focus

This dose sound like a focus problem but if it is not then it could be the Xtals got miss aligned in the move.

There are little xtals inside that the beam must go through and it possible they have become miss aligned.

Good luck...
__________________
White Fusion Time Machine 445
473nm LRS-0473-KFM-00150-10 158.5mW Lab style
laser used in the making of the latest TRON movie

CNI PGL-III-C-589 125mW
520 in a SH-032
Viasho 532nm 500mW
CNI pen 532nm 84mW
The Violet Pip Squeek 45mW

_____________________________________
LOOKING FOR A HOST WITH PERFECT HEAT SINKING
order your C-88 Cu kit today !


Last edited by Flaminpyro; 11-15-2011 at 09:56 AM.
Flaminpyro is offline   Reply With Quote
Old 11-15-2011, 04:12 PM #4
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 3651
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 3651
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: 20mW green laser out of focus

+1 on cleaning the lens. When you say smudge, is it a circular smudge? That would indicate a focus problem because the dot is a circle and when defocused, stays a nice, round circle. If it is more of a big blur with no defined edges, it probably has some gunk on the lens
BShanahan14rulz is offline   Reply With Quote
Old 11-15-2011, 04:13 PM #5
Junior Member
 
Join Date: Nov 2011
Posts: 2
Rep Power: 0
lysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to all
lysozymes lysozymes is offline
Junior Member
 
Join Date: Nov 2011
Posts: 2
Rep Power: 0
lysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to alllysozymes is a name known to all
Default Re: 20mW green laser out of focus

thanks guys for the amazingly quick response!

ok, will start cleaning the lens first. if that doesn't do it, I'll open it up and check the xtal alignment.

thanks rocket689 for suggesting the threaded lens. I checked, the whole thing is screwed on pretty tight with the laser warning sign still on top of the thread.

wish me luck guys!
lysozymes is offline   Reply With Quote
Old 11-15-2011, 04:23 PM #6
jimdt7's Avatar
Class 3R Laser
 
Join Date: Feb 2011
Location: Greece
Posts: 1,899
Rep Power: 1422
jimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond repute
Send a message via Skype™ to jimdt7
jimdt7 jimdt7 is offline
Class 3R Laser
jimdt7's Avatar
 
Join Date: Feb 2011
Location: Greece
Posts: 1,899
Rep Power: 1422
jimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond reputejimdt7 has a reputation beyond repute
Send a message via Skype™ to jimdt7
Default Re: 20mW green laser out of focus

Good luck ! And remember never look at the diode while it is on !

Jim
__________________
mY lAsErS

Blue-rays
PHR-803t, 117mW Aurora C6
320mW 6x Hotlight

Blues

Bigboy ~2.5W
Labby 1.8W
1.1W in Aurora C6
800mW WL Spyder Arctic G2
Greens
O-like Green Crown 500mW Peak 731mW Chart here
PL520 100mW
Cheap e-bay 25mW and 100mW

Reds
O-like cute 300mW (Dead)

LPMs
Modded Laserbee 2.5W USB
jimdt7 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 03:09 PM.


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