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Fingerprint pattern on green laser

Uni23

New member
Joined
Aug 19, 2018
Messages
5
Points
1
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

Well-known member
Joined
May 14, 2011
Messages
4,740
Points
113
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
 

Singlemode Laser

Active member
Joined
Jun 25, 2017
Messages
297
Points
43
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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