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Dual Red/Green Portable HeNe + Mode Hop
- Thread starter Jimmymcjimthejim
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aryntha
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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. 
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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?
daguin
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I used to have one of those little shorty GreNe's that mode hopped as well
Peace,
dave
Last edited:
bobhaha
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It's not a He-Ne... But I think I win the worst mode hop award 
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I think that might be spherical aberration, not mode hopping.
bobhaha
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Dunno.... this is what it looks like normally (its the 473)... But if it gets too hot it mode hops...
Last edited:
qumefox
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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.