This was online a while back. What they did was make an arc, lightly brushed into acrylic, using a device similar to a drawing compass. One leg of the compass is moved to follow the path of an object (a triangle shape, etc.). With the other leg, make the sweeping arcs. The spread of the compass gives the “depth” of the design, or something like that. These are best viewed in sunlight or a bright spotlight. You almost can’t see the effect in ordinary diffused room light.
I once made a couple of mediocre holograms, and ruined a bunch of acrylic scraps. I also toyed with the idea of a motorized version of the compass pen. With a computer-guided system, you could probably whip up some nice effects. I'd bet a plotter could be programmed to make suitable arcs on acrylic.
I've seen the holograph work before. I think the guy did something on a car hood or somesuch. That was a long time ago, though.
ReplyDeleteWhat, he's not going to show us how he does it?
ReplyDeleteThis was online a while back. What they did was make an arc, lightly brushed into acrylic, using a device similar to a drawing compass. One leg of the compass is moved to follow the path of an object (a triangle shape, etc.). With the other leg, make the sweeping arcs. The spread of the compass gives the “depth” of the design, or something like that. These are best viewed in sunlight or a bright spotlight. You almost can’t see the effect in ordinary diffused room light.
ReplyDeleteHere's where I found that:
http://www.eskimo.com/~billb/amateur/holo1.html
I once made a couple of mediocre holograms, and ruined a bunch of acrylic scraps. I also toyed with the idea of a motorized version of the compass pen. With a computer-guided system, you could probably whip up some nice effects. I'd bet a plotter could be programmed to make suitable arcs on acrylic.
Here's an Instructible on using a Dremel:
ReplyDeletehttp://www.instructables.com/id/Make-a-Tool-to-Draw-Scratch-Holograms!/
It seems like a small step to go CNC from there.