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Soundwave
4.99mW Green Laser Toy
Joined: 30 Sep 2005
Posts: 3
Location: London Baby
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 Posted: 9/30/05, 5:28 PM Post subject: what the hell? laser |
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Hello
Ive recently got a great 75mW laser pointer and shameful to say ive already gotten it dirty but im fixing that 2mo
thanks to ur helpful cleaning tips,
theres one thing im worried about that might nt be realted to the cleaning of the lens,
i get this cicrular patten round the main spot of the beam (see pics) a few secs after i press the button.
i dont think this is normal hopefully it will go when i clean the lens 2mo but im doubt it, any help?
plus i havet droped it or knocked it since ive receive it ive had it about 24hours now
and soz that i havet resized the pics. theres a video if u want it Pm me
thank you
pic 1 before
pic 2 after a few secs
thank you |
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nero_design
Wicked Lasers God
Joined: 02 Sep 2005
Posts: 1463
Picture(s): 98
Movie(s): 1
Location: Australia
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| Posted: 9/30/05, 7:43 PM Post subject: |
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There's a few things that will cause this type of halo effect:
1. Wasn't completely cleaned
2. Glass was scratched during cleaning (in a circular manner)
3. There is a tiny fiber in the way of the beam
4. Some lasers have a glass filter between the actual lens and the aperture.
by removing the filter or moving it during cleaning and not putting it back
into place properly, the laser beam is being bounced partially towards the
walls of the aperture hole and are then reflecting onto the wall alongside
the beam.
Looks to me like option #1. Since your Q-tip or Microfiber cloth was
probably pushed in and turned in a circular motion, any residue or oil
from your fingers or one the lens may form a circular swash on the lens.
This in turn projects a similar shape in some cases. So does #2 (lint or fibers
right near the aperture).
Be gentle when cleaning. Be VERY gentle. Try to get a microfiber cloth if you
are not using one yet. You can get them from any sunglasses or optician.
Be sure to get one designed for cleaning optics and not for industrial cleaning.
Avoid debris from entering your laser by doing this:
http://www.pbase.com/nero_design/image/49239510
_________________
Regards,
Marco Nero
* Laser Gallery: http://www.pbase.com/nero_design/pro1wickedlasers
* Always use appropriate laser-safe eyewear when using higher powered lasers. |
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Soundwave
4.99mW Green Laser Toy
Joined: 30 Sep 2005
Posts: 3
Location: London Baby
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| Posted: 9/30/05, 8:11 PM Post subject: |
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| cheers i'll give it ago n let u know thank u |
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Lift-off
55mW Advanced Wicked Laser
Joined: 26 Aug 2005
Posts: 67
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| Posted: 10/01/05, 3:13 AM Post subject: |
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Hi friends,
i recently experience this. I generally first (or only) clean lens from dust (i hope to keep them not dirty or with any pg of oil using tape/scotch technique) using a very very very dry air jet and regulating its power in function of the distance of the nozzle from the lens. There were a small point on a lens behind it, may be a small piece of dust, and it disappeared by injecting air from the battery van.
Hoping this info could be usefull for you all...
Regards |
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Nexus
Wicked Lasers Master
Joined: 02 Jun 2005
Posts: 756
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| Posted: 10/01/05, 9:38 PM Post subject: |
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If laser rings persists, please contact me @ wicked@wickedlasers.com for repair.
Best Regards |
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Jason
Phoenix Laser
Joined: 27 Aug 2005
Posts: 75
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| Posted: 10/03/05, 12:45 PM Post subject: OMG! |
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DON'T CLEAN YOUR POINTER WITH COMPRESSED AIR - EVER EVER EVER EVER EVER!!!!!!!!!!!
DON'T CLEAN YOUR POINTER WITH COMPRESSED AIR - EVER EVER EVER EVER EVER!!!!!!!!!!!
It doesn't matter how "dry the air is" because the lens on the front of the laser is not sealed entirely.
It is only "tack glued" in two spots. This means that you can "blow debris" behind the lens by hitting
it with compressed air...
DON'T CLEAN YOUR POINTER WITH COMPRESSED AIR - EVER EVER EVER EVER EVER!!!!!!!!!!!
DON'T CLEAN YOUR POINTER WITH COMPRESSED AIR - EVER EVER EVER EVER EVER!!!!!!!!!!!
also, don't clean it with any liquids...even if they are for cleaning optics, the fluid can get BEHIND the
lens because it isn't sealed...
_________________
I like L.A.S.E.R.S. |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7539
Location: Canada
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| Posted: 10/03/05, 1:55 PM Post subject: |
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| If the lens is tack glued in 2 spots, I guess one could add additional glue around the circumfrence of the lens? That would then seal the area behind the lens, and make cleaning a bit less worrysome. |
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Mad_Demon
25mW Classic Wicked Laser
Joined: 20 Sep 2005
Posts: 31
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| Posted: 10/04/05, 7:25 AM Post subject: |
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I'm thinking the non-sealed-lens wasn't done to cheap out on glue. Perhaps sealing it is not such a good idea. Compare it to a single windowpane in a warm, moist house on a cold day. You get condensation on the window.
If you seal off the laser, you will trap the current air inside it. If this is moist, it could warm up by the laserbeam and cause condensation on the inside of the lens.
Maybe I'm wrong about this, but it's a consideration. |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1735
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/04/05, 8:24 AM Post subject: RE: |
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I think mad demon has a VERY legit point there on that one! Cheers Dale
_________________
Best Regards Chargerman
Great divergence calculator 
http://www.pseudonomen.com/lasers/calculators/ |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7539
Location: Canada
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| Posted: 10/04/05, 12:42 PM Post subject: |
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Good point, I guess this would be optimal then if it were a vaccum.
cheers, |
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Soundwave
4.99mW Green Laser Toy
Joined: 30 Sep 2005
Posts: 3
Location: London Baby
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| Posted: 10/28/05, 2:41 PM Post subject: |
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Wooo Hooo got my replacement laser wooHoo!!
now where can i can sum cool crystals to make cool club like effects? |
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