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Thread: 640nm 500mw Cni laser question.

  1. #1
    Join Date
    Sep 2009
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    Default 640nm 500mw Cni laser question.

    Wondering if anyone else has one of these? I bought one a few days ago and have a question about it. When on I can see 2 beams coming out of it in like the first 2 feet of the beam, after 2 feet it really is not noticeable anymore. This is my first laser of this type so don't know if its supposed to be like this or not.

  2. #2
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    Jul 2006
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    Connecticut, USA
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    Perfectly normal. They are multi-diode lasers therefore there is probably (if done right) 4 diodes being knife edged then PBS'd together. Seeing multiple beams at aperture is perfectly normal.
    http://www.laserist.org/images/ildalogos/ILDA-logo_colored-beams_Corporate_150w.jpg

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  3. #3
    Join Date
    Sep 2009
    Location
    Mass
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    Okay, thats what I thought but never having one before wanted to check before to much time goes buy. Probably sit on the shelf for a while till I get a few more odds and end pieces for my projector.

    Yeah think its 4 diodes, can see the pbs cube inside of it. For some reason it doesnt have any glass on the square where the laser exits.
    Last edited by aktopjian; 10-27-2011 at 15:02.

  4. #4
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    Jul 2009
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    The Netherlands
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    Check my Kvant, it has the same:

    http://hobbybob.home.xs4all.nl/RGB/SAM_0164.JPG
    I didn't fail !
    I just found out 10,000 ways that didn't work.

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