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Thread: Seeing double

  1. #1
    Join Date
    Sep 2007
    Location
    Essex, England
    Posts
    792

    Default Seeing double

    My blue has two beams rather than one. Is this normal?

    I Didnt see it before....Never seemed to be this fat iether....could I have damanged the lense?
    Each beam is about a milimeter wide, and there is just under a milimeter between them...

    Is this cool?

    Graham

  2. #2

    Default

    sadly lasever is the same, it needs about 15mins to warm up before it goes.

    its called mode hopping
    Eat Sleep Lase Repeat


    Aluminium Optic Mounts

    http://www.laser-man.co.uk/opticmounts/

  3. #3
    Join Date
    Sep 2007
    Location
    Essex, England
    Posts
    792

    Default

    Really Andy? well that's not so bad (relief)....I'm going to leave it running for a while and see if it goes.

    I can see two dots / beams in the graphic thast displaying so its a problem if it doesnt dissapear...

    tick tock, tick tock

  4. #4

    Default

    yeah let it warm up a bit
    Eat Sleep Lase Repeat


    Aluminium Optic Mounts

    http://www.laser-man.co.uk/opticmounts/

  5. #5
    Join Date
    Sep 2007
    Location
    Essex, England
    Posts
    792

    Default

    Andy, you were so right Thanks.

  6. #6

    Default

    no probs .
    Eat Sleep Lase Repeat


    Aluminium Optic Mounts

    http://www.laser-man.co.uk/opticmounts/

  7. #7
    Join Date
    Jan 2007
    Location
    Yorkshire, UK
    Posts
    4,556

    Default

    Hi Graham

    This quite often happens with DPSS lasers, they start off in TEM01 mode and then switch into TEM00 mode once they have warmed up and stabilised. It's nothing to unduly worry about, it's when they stay in TEM01 mode, as my green has done recently, that you start to worry

    Jem
    Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.... Douglas Adams 1952 - 2001

  8. #8
    Join Date
    Jul 2007
    Location
    Knoxville, TN & Huntsville, AL, USA
    Posts
    3,094

    Default

    Whew - I feel better, too!

    My CNI blue was doing that and I thought I had bought a really expensive "lemon"!!

    RR
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

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