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Old 11-18-2007, 04:36 PM #1
Chris.
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Default Higher power lasers and optics.

I'm pretty new to lasers and only have a 50mW Ebayser and a ~100mw red DIY laser.
In both cases now the dot is really untidy, it this a problem confined to higher powers as when they are turned down these imperfections become less visable?

When I say untidy, I mean that around the central bright spot, there is what I would describe as a red/green 'haze' which is amplified with distance. (Hence my lovely DIY red looks horrible when projected maybe 10-20m onto a white wall)
If I were to buy a more expensive unit with glass optics would this likely solve these problems?


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Old 11-18-2007, 08:06 PM #2
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Default Re: Higher power lasers and optics.

It's probably just a dirty lens. So just take a search around and find some different ways to clean them.
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Old 11-18-2007, 08:15 PM #3
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Default Re: Higher power lasers and optics.

Probably, maybe I should use a fog machine instead of cigarette smoke :
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Old 11-19-2007, 01:06 PM #4
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Default Re: Higher power lasers and optics.

I hate smoking! But a fogger is a great investment, I still don't have one but my neighbor does so I just take his all of the time. I'm tempted to see if I can find a good deal on a hazer. A good option to help keep your lens clean would also to get/make a flat cap when using fog so it doesn't get directly on the lens of your laser.
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Old 11-19-2007, 01:17 PM #5
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Default Re: Higher power lasers and optics.

Regarding beam visibility, i've been running an ultrasonic humidifier the last few days. I can tell the difference between when it's on and off. yeah, there's a nice mist around the unit that does great things for a beam, but after about 15 minutes, the beam visibility doubles or tripples in the house AWAY from the unit.
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Old 11-19-2007, 01:33 PM #6
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Default Re: Higher power lasers and optics.

Yeah, what works really well in my house is:
After having a nice hot shower, keep the door closed and try out your laser
The humidity really highlights the beam!
I'm going to try make some effects soon using the motors out of all the CD drives I tore apart :
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