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Old 11-21-2011, 03:54 AM #1
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Default Dual Red/Green Portable HeNe + Mode Hop

Thought you guys might find this interesting.
The Engineer's Cove: Twin HeNe's
Enjoy!


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Old 11-21-2011, 08:14 AM #2
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

Kinda cool. I actually have a multimode green HeNe. Very bright for the size, but it doesn't mode hop. I'd love to see a long tube multimode greeNe. :P
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Old 11-23-2011, 02:26 AM #3
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

Yes! I hope I'm not the only one with a mode hopping HeNe. It's so mesmerizing, just watching the dot shift around, almost as if it is possessed. What kind of dot does your multimode GreeNe have?
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Old 11-24-2011, 01:12 PM #4
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Default Re: Dual Red/Green Portable HeNe + Mode Hop




I used to have one of those little shorty GreNe's that mode hopped as well

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dave
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Old 11-24-2011, 03:37 PM #5
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

It's not a He-Ne... But I think I win the worst mode hop award

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Old 11-24-2011, 03:48 PM #6
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

I think that might be spherical aberration, not mode hopping.
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Old 11-24-2011, 03:53 PM #7
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

Dunno.... this is what it looks like normally (its the 473)... But if it gets too hot it mode hops...

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Old 11-25-2011, 08:16 PM #8
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Default Re: Dual Red/Green Portable HeNe + Mode Hop

More than likely when your 473 mode hops, it's hitting a slightly different area of the lens that isn't quite 'perfect'.. I have a slew of these.. both glass and acrylic.. that have spots in that that 'aren't quite right' But you can rotate the lenses a few degrees and the problem vanishes.
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