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Fingerprint pattern on green laser

Uni23

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Hello, I have recently purchased a green laser, and about a week after recieving it the laser became unforcused and the dot made a fingerprint pattern. What do I do?
 

Encap

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Hello, I have recently purchased a green laser, and about a week after recieving it the laser became unforcused and the dot made a fingerprint pattern. What do I do?
Return it
 
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Remove the lens and look at the uncollimated beam. If it looks smooth, than your lens is dirty and/or broken otherwise the diode got damaged.

Singlemode
 




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