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FrozenGate by Avery

Propagating beams

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dins117

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Hello, would any one happen to know how in laser shows they get what is usually seen as a solid laser beam to fool the eye in to looking like it is propagating outward? like instead of being the usual solid beam from emitter to the ending collision point, you instead see the beam end or/or begin in mid air and this non continuous beam segment moves in a direction.
my background in physics is limited to high school they did cover wave interference and wave/particle theory and such but most of that is long forgotten now!
 
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Go on youtube and search for nike watershow. This is what you mean. I don't know with which technologic this is made but it looks great.
 
The Qube said:
Go on youtube and search for nike watershow. This is what you mean. I don't know with which technologic this is made but it looks great.
Click to expand...

nike watershow doesnt seem to show much but nike shoes being dunked in water! also i took a look at one water fountain laser show on youtube, looks like the localized water mist gives a sort of floating beam effect but this is not what i am talking about, the beams z axis is controllable through a medium like smoke, it can move through it on the z axis. have seen it on some tiesto laser shows
 
dins117 said:
Hello, would any one happen to know how in laser shows they get what is usually seen as a solid laser beam to fool the eye in to looking like it is propagating outward? like instead of being the usual solid beam from emitter to the ending collision point, you instead see the beam end or/or begin in mid air and this non continuous beam segment moves in a direction.
my background in physics is limited to high school they did cover wave interference and wave/particle theory and such but most of that is long forgotten now!
Click to expand...

An easy way is to use a haze in the air, generated smoke effects for example, to create something for the laser to excite. In clean air, the beams are not really visible, especially at distance...so the beam "Appears" when its passing through something that gives that air glow, and, that can then make it appear as though the beam started or ended at the boundaries of the smoke, etc.

For this type of thing, you would not need heavy smoke, so little would be needed it could be quite subtle.
 
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Teej said:
An easy way is to use a haze in the air, generated smoke effects for example, to create something for the laser to excite. In clean air, the beams are not really visible, especially at distance...so the beam "Appears" when its passing through something that gives that air glow, and, that can then make it appear as though the beam started or ended at the boundaries of the smoke, etc.

For this type of thing, you would not need heavy smoke, so little would be needed it could be quite subtle.
Click to expand...

You mean something like this: https://www.youtube.com/watch?v=gS0sV7kj-8E&list=UUJYJgj7rzsn0vdR7fkgjuIA
 
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