Sky Writer

[fluff]

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

[liteglow]

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

[yaddatrance]

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

[liteglow]

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