I've worked in Ohio and PA with TSO and know the
laser and pryo guys. I have worked directly with the
Pyro Crew Chief Tristan Ford,
Pyro Tech Jan Sanderse, and EFX Tech Simon Brierley. The
Pyro Company (Pyrotek Special Effects Inc.) and the
Laser Company (
Laser Design Productions) is owned by the same parent company so I have also spent a good
bit of time working around and talking to
Laser Crew Chief Jason McEachern.
To
clear up the misconception, they do NOT use dryice
fog. As a matter of fact what looks like dryice
fog isn't
fog at all!
The
fog often gets a swirl in it from the
house HVAC or the fans in the
truss that shove the
fog downwards. Combine that with the way cameras capture
laser you get what is seen in the videos.
In 2009 they used the following on the tour...
Two 10
watt Full Color DPSS/
Diode Laser (Center
Stage &
FOH)
Four 5
watt DPSS KTP NdYag
laser
Six LDP 10 Projectors
60
Bounce Mirrors
Pangolin Control Software
2010 was close to that..just more of the 10w full color lasers but I can't find the official list right now.
More info might be available on their website at
Laser Design Productions a few of the
Gallery images from the 09 tour on their site shows the swirls in the
fog as well.