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Thread: Optical Trapping

  1. #1
    Join Date
    Nov 2007
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    Cairns, Australia
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    1,896

    Default Optical Trapping

    Most of you would know about it, but I managed to snap some really good pictures of it. They are 3264x2448 jpg's, so I cant put them here directly, so here:

    http://files.getdropbox.com/u/203420/IMG_1021.JPG

    And the best one:

    http://files.getdropbox.com/u/203420/IMG_1013.JPG



    Cheers,
    Dan

  2. #2
    Join Date
    Jan 2007
    Location
    Yorkshire, UK
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    4,584

    Default

    Hey Dan, that's really cool. It's not the easiest thing to photograph. Usually by the time you've got the camera ready the effect has gone.

    Great Job!

    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

  3. #3
    Join Date
    Nov 2007
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    Cairns, Australia
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    Default

    I pretty much shut up the room, blocked my laptop exhaust, breathed downwards and moved very slowly, and the laser was inside a half-sealed box. I managed to get a bit trapped for over 1 minute doing this.

    Thanks

  4. #4
    Join Date
    Feb 2005
    Location
    Florida
    Posts
    109

    Default

    I'm not sure what that is. My wild guess is that your levitating a speck of dust.

    --John

  5. #5
    Join Date
    Dec 2008
    Location
    Southport, UK
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    Default

    That's cool, what did you use as a seed? Looks to be some sort of fibrous material, I've read that plastics work well.
    http://img62.imageshack.us/img62/3985/laser.gif

    Doc's website

    The Health and Safety Act 1971

    Recklessly interfering with Darwin’s natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.





  6. #6
    Join Date
    Nov 2007
    Location
    Cairns, Australia
    Posts
    1,896

    Default

    I burnt the tip of a black felt pen, so yeah, some sort of fiber. And essentially it's just wedged in the focal point of the laser.

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