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Old 02-11-2017, 12:33 AM #1
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Unhappy Two dots?

The laser I ordered came into today, and in about 20 seconds of use the dots split into two. Any reason why and can I fix it?

(Green laser just awkwardly holding glasses in front of the camera so you can see)
Two dots?-image-2017-02-10.jpg

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Last edited by Pancit10; 02-11-2017 at 01:57 AM.
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Old 02-11-2017, 01:48 AM #2
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Default Re: Two dots?

This is normal from low quality 532s. It's called mode hopping and there's nothing you can do about it.
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Old 02-11-2017, 03:36 AM #3
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Default Re: Two dots?

Some of these have multiple lines. Up to six that I've seen. I measured one that had four lines on my spectrometer and they ran from 532nm to 541nm.
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Old 02-11-2017, 04:38 AM #4
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Default Re: Two dots?

That output would drive me nuts even on a cheap laser but yes, mode hopping as I have never seen in person.

+rep btw for actually having glasses for your laser.
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Old 02-11-2017, 06:53 AM #5
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Default Re: Two dots?

Yes, it's mode hopping. If you have variable power laser, change the power. My 100 mW greenie does the same thing at low power and when cold, after I increase it it switches to TEM00. Try new batteries (fully charged). Try laser in different temperatures (reasonably - to prevent moisture or overheating). Changing these factors might help.
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Old 02-11-2017, 02:16 PM #6
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Default Re: Two dots?

Well that sucks. As far as I can tell it isn't a variable power laser and switching the batteries didn't seem to change it so I guess I'll just have to deal with it. Also, ty for the rep they were cheap and I was paranoid so why not.
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Old 02-11-2017, 02:21 PM #7
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Default Re: Two dots?

Quote:
Originally Posted by Pancit10 View Post
The laser I ordered came into today, and in about 20 seconds of use the dots split into two. Any reason why and can I fix it?

(Green laser just awkwardly holding glasses in front of the camera so you can see)
Attachment 54747

Here's the LASER
Return it for refund or exchange---the advert says 60 days money back
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Old 02-11-2017, 05:38 PM #8
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Default Re: Two dots?

Quote:
Originally Posted by Encap View Post
Return it for refund or exchange---the advert says 60 days money back
Wow thanks, don't know how I missed that. Just requested a replacement.
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