Old 10-09-2010, 11:48 PM #1
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Default guess what power/wavelength this is

I took the time to make a proper beamshot of my laser, I'm curious who be the closest in guessing it's wavelength and power. I haven't added any smoke or anything to visualize the beam more than just plain air (no vacuum).
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guess what power/wavelength this is-dscf0808_s.jpg  


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Old 10-09-2010, 11:55 PM #2
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Default Re: guess what power/wavelength this is

543.2nm GreeNe, 2-5mW?


Edit: Oh the picture gets bigger, didn't even notice that

Last edited by Prototype; 10-10-2010 at 01:42 AM.
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Old 10-10-2010, 01:11 AM #3
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Default Re: guess what power/wavelength this is

That's a GreeNe all right. less than 3mW.
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Old 10-10-2010, 01:40 AM #4
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Default Re: guess what power/wavelength this is

That Green LED display in the background looks brighter than
that Laser...
So what's the purpose of this Thread....

Jerry
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Last edited by lasersbee; 10-10-2010 at 02:06 AM. Reason: spelling errors
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Old 10-10-2010, 02:03 AM #5
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Default Re: guess what power/wavelength this is

looks green 2 me
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Old 10-10-2010, 03:20 AM #6
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Default Re: guess what power/wavelength this is

Guessing power is impossible without knowing exposure time and aperture, as well as atmospheric conditions... but i have to agree that it looks like a green HeNe.

Given the typical output power of such lasers and the blooming of the led display, it can't be more than a few mW.
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Old 10-10-2010, 08:52 AM #7
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Default Re: guess what power/wavelength this is

What gave it away it's a HeNe? I guess me asking the wavelength
But it's only 2mW, I doubt if there are any green HeNe's above 2mW. But I took this foto with a very long exposure. The beam is visible at night, but on this photo it looks far better than in reality.
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Old 10-10-2010, 08:53 AM #8
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Default Re: guess what power/wavelength this is

What gave it away was the plasma emission light from the HeNe tube at the start of the beam :P
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Old 10-11-2010, 10:05 AM #9
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Default Re: guess what power/wavelength this is

The LED display gives away it was a pretty long exposure.
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Old 10-13-2010, 10:58 AM #10
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Default Re: guess what power/wavelength this is

How much can a little HeNe tube give ? 2 - 5 maybe 10 mW ? and the beam is s visible at night ??? ehmm i don't think so ...

so i guess 5 mW max
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Old 10-13-2010, 12:00 PM #11
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Default Re: guess what power/wavelength this is

5mW max for a good one, definitely not a green HeNe though.

For small tubes, 0.1 to 3mW is more accurate.
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Old 11-26-2010, 02:04 PM #12
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Default Re: guess what power/wavelength this is

Greene laser 2mw
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