Fingerprint pattern on green laser

[Uni23]

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]

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

 

[Uni23]

Return it

That will not be possible.

 

[Singlemode Laser]

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