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Old 07-07-2009, 07:51 PM #1
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Default Laser Lens Cleaning Help

So, today I needed to clean my laser lens. So I first tried cleaning it with a gas duster. Bad idea. It left some nasty residue on it, and now it wont come off. So I got a micro fiber cloth, and put some 70% isopropyl alcohol on it. Well, the residue is sorta gone, but now there is this noticeable line on the laser point. And I can't get rid of it. Did I scratch the lens? What is the proper way to clean it then? I did search the forum, and I found so many mixed answers.


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Old 07-07-2009, 07:55 PM #2
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Default Re: Laser Lens Cleaning Help

is it an acrylic lens or a glass lens? i scratched my acrylic with alcohol. i only use q-tips
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Old 07-07-2009, 07:55 PM #3
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Default Re: Laser Lens Cleaning Help

is it an acrylic lens or a glass lens? i scratched my acrylic with alcohol. i only use q-tips with water now.
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Old 07-07-2009, 08:06 PM #4
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Default Re: Laser Lens Cleaning Help

It's a Viper 125mw from Dragon Lasers. A standard CNI pen. I'm not sure if its glass or acryllic. It looks sorta purple.
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Old 07-07-2009, 09:55 PM #5
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Default Re: Laser Lens Cleaning Help

i cant help you with that one. have you tried the search feature yet?
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Old 07-07-2009, 11:06 PM #6
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Default Re: Laser Lens Cleaning Help

yea man the material that the lens is made of has a lot to do with it cleaning prcoess. Make sure that if your lens has AR coating that you don't use something corrosive! No Orange Glo here!
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Old 07-08-2009, 01:42 AM #7
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Default Re: Laser Lens Cleaning Help

Like I said in my very first post. "I Did Search The Forum"

I found a bunch of threads, and some of them said to use a Q-tip, and then in a different thread it said not to use a Q-Tip, and so on. So I am wondering where lens cleaning stands right now? How should it be cleaned? I used a 70% isopropyl alcohol with a micro fiber cloth, and that did not work. How much pressure should I put when I am cleaning the lens? Should I go in a circular motion?
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Old 07-08-2009, 01:56 AM #8
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Default Re: Laser Lens Cleaning Help

your scratch might be permanent. unthread the lens and look closely at it. look for the scratch. it might be grime or a smudge from the alcohol etching into the acrylic. there aren't any ways that i know of to get off a scratch
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Old 07-08-2009, 02:25 AM #9
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Default Re: Laser Lens Cleaning Help

I was able to get rid of the line using a q-tip and water. it looked like this before _._ the period being the dot. But there is still this coat of residue from the can of compressed air. Is there anything I can do about that?
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Old 07-08-2009, 07:48 AM #10
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Default Re: Laser Lens Cleaning Help

The line is normal with a red LPC diode. If it's gone, the lens just causes so much scatter now that you can't see it any more (assuming it's focused properly).
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Old 07-08-2009, 09:17 AM #11
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Default Re: Laser Lens Cleaning Help

If the line is a diode artifact, its perfectly normal. Afaik all dvd-burner-diode based lasers have this to some extent, including dx's dilda's and such. Green lasers usually dont have this problem.

As for cleaning materials and scratching: Using (isopropyl)alcohol and a q-tip or microfiber cloth is, in itself, not dangerious to either glass or acrylic lenses.

But you are also trying to clean -something- off the lens. If that something is not soluble but solid (dust) it can in fact be quite hard and abrasive to the lens during mechanical cleaning. Dragging metal powder (from filing) over a lens with a q-tip or cloth will scratch it, works like sandpaper.
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Old 07-08-2009, 10:28 AM #12
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Default Re: Laser Lens Cleaning Help

One problem with Q-tips is that they have a tendency to leave fibers behind. A microfiber cloth would be preferrable imho. Also there are special soft tissues for cleaning lenses, ask in a fotografic supply store.
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Old 07-10-2009, 02:05 AM #13
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Default Re: Laser Lens Cleaning Help

Does it matter how hard I press down?
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Old 07-10-2009, 11:18 AM #14
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Default Re: Laser Lens Cleaning Help

Well of course. Use just a light touch. I'd use 70% isopropyl alcohol (add maybe one small!!!! drop of liquid dishwasher detergent per 250ml). Keep the lens and paper/cloth/Q-tip wet while cleaning. Then, rinse the lens off with the alcohol (hold it by the rim with tweezers) and let it dry completely on air - don't rub it dry.
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Old 07-10-2009, 02:01 PM #15
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Default Re: Laser Lens Cleaning Help

LENSPEN is The superior Camera lens cleaning system for all fine optics, rifle scopes, camcorder and camera viewer screens, binoculars

You can also buy them from ebay.

Use that and no more, they are simply perfect. I own a mini pro for cameras, a cellclear for lasers and a vidimax for screens.
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