It is possible that this video has already been posted already, but a quick search of the URL returned nothing, so Ill go ahead:
Let me start by noting that this is NOT my video; I just really love it, and wanted to share. While I have been fascinated by lasers (in general) for the majority of my life now, since I was a little kid, I cannot call myself any kind of "expert" when it comes to the hobby, especially in regards to scanning/shows. I do however know what I like, and give the producer of this video a lot of respect for their work on this show: I dont find it to be repetitive like frankly most that I come across, the color mixing and music synchronizing are flawless, and it does a good job of keeping full coverage of the "stage" at all times.
The show features an effect which I can imagine is accomplished fairly easily, but even after helping out with/being exposed to some scanners/shows in person, & just watching every freakin' video on the net, I havent been able to pinpoint exactly how it's done: between 1:47 - 2:05, a ring seems to pulsate up & outward on the entirety of the beams, starting @ the base (where the scanner is) all the way out to the tips... Especially @ and after 1:55. I want to guess that a screen of some sort is involved, but that seems to fall to the wayside since the "ring" pulsates all the way out to the ends of the beams.
So how is it done? While I dont have any scanners just yet, I am compiling what has now become a massive folder of information on scanning/projectors; most of what I have gathered so far is info/pics/conversations to help me build a machine from scratch, but I dont have much info on effects/"tricks"/use of software for the actual productions).... So any assistance pertaining to this matter **especially that includes or points to some step by step instructions** would be greatly appreciated.
I hope this video hasnt been posted yet, and thanks in advance for any help that can be offered..... Enjoy!
-Brett G