About this : http://www.lasershows.net/content/view/84/89/
It seems like they have stolen my idea :P lol
For a very very long time ago, I did ask if it would be possible to have a 3rd galvo on the Z axis !!
My idea was to have x and y for the UP and DOWN..
Then add one more" Z " that use a focal lens in front of the laser output (after the galvo)
What the "Z" galvo does is to adjust the focal point of the laser in the air.
In theory it means that the laser will be more visible exactly where the focal point is .
And if the "Z" lens moves at the same speed as a regular galvo 30-60kpps .
It would be possible to make a 3D hologram in the air, that use smoke as screen in the room.
And the TINY focused DOT in the air will only be visible at that speed..
Well...... that was my theory
Only the $$$$.$$ did stop me on that project :P



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