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Thread: Sky Writer

  1. #1
    Join Date
    Aug 2005
    Location
    UK
    Posts
    305

    Default Sky Writer

    Hi all

    I have an enquiry from a customer for a system that will project logo's, text etc on a 2000 ft cloud base.

    He would also like to project onto surf at 300 meters ( sorry for mixing imperial/metric ! ).

    Any thoughts ?

    Maybe a high power dpss 532 with wide beam diameter . How wide would it need to be to get the divergence right down ?

    Is this possible with a dpss, or does he need a gas system?

    All ideas welcomed.

    Thanks
    The light at the end of the tunnel. Its' a white laser.
    www.rocknite.co.uk

  2. #2
    Join Date
    Jan 2005
    Location
    Norway
    Posts
    1,302

    Default

    you can make a DOT (circle,square) on the sky if it`s low.. using a 200-300mW green laser..

    But to WRITE you need aprox more than 1w laser for great result



    cheers

  3. #3
    Join Date
    Jun 2005
    Location
    SoCal
    Posts
    506

    Default

    For cloud scans I'd actually recommend renting a 40W green laserscope
    Otherwise it's almost pure luck.... Lots of paperwork involved too if its in
    the states...

    I can't imagine ~1.6um of divergence actually mattering, but if there are
    issues, then they sell "telescope" recollimators fairly inexpensively...

    Most high power lasers will be fine for surf at night

  4. #4
    Join Date
    Jan 2005
    Location
    Norway
    Posts
    1,302

    Default

    wow 40w ...

    Then we are talking about showing movies in the sky not only writing...

    I want to se a 40w in the sky.. THAT must be cool..

    I use my 240mW laser up in the sky with my 6008 galvos, and I can write small words... But the clouds have to be low... You know when it`s a foggy day outside

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