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Old 03-08-2016, 09:59 PM #1
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Default Adding an External Lens to Focus Beam

Hello all,
I am extremely new to lasers so I welcome all the help I can get! I recently purchased a laser (120mW 520nm 50m diving laser) for some underwater work. When I tested it out on land, I noticed it had quite a large divergence when shot over 200ft. Correct me if I am wrong, but I don't believe I can focus the laser without heavy modifications (opening it up and such). Would it be possible to attach an external lens to the laser to focus the beam/tighten the divergence?

Here is the link to the laser I purchased:
Diving laser 50 meters

Thank you in advance for your help!
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GreenBean


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Old 03-10-2016, 05:09 AM #2
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Default Re: Adding an External Lens to Focus Beam

Sometimes the front cap can be unscrew and you can get to the lens and adjust the divergence, becareful it may be glued and very hard to open ?
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