Hologram of the Stargate Event Horizon?

[mwalker2544]

So I recently had a replica of the Stargate made. I was thinking about different ways to make the event horizon. These new fan style hologram projectors look like they might be a cool way to the entire activation "kawoosh" effect, but I have no idea where to get 3d video files like that.

Anyone out there have any idea about how/where to get those kind of videos. I found a few sites with stock stuff but nothing that complex.

 

[TheLowBassMan]

Was thinking about that myself....that seems like a great idea

 

[Bloop]

You shouldn't need a 3D video file - I don't think those fan projectors produce an actual 3D hologram. They just create the illusion of images being somewhat 3D because the fan blades can't really be seen when spinning, so the images seem to be floating in midair, but they're still just flat images. The flashing of the leds are timed with the spinning of the blades to create the illusion due to our eyes not being able to see fast moving objects, so the rapidly flashing leds all blend together so we see images and video. The images that are projected are still flat, but just look sort of 3D because they appear to be floating in space.The demo videos I've seen online show things like video of 3D rendered objects spinning and moving, but as far as I can tell, they're still just produced from flat, 2D video.

If you do use an led fan projector for your project, all you should need is a normal, 2D video file of the event horizon.

 

[mwalker2544]

You shouldn't need a 3D video file - I don't think those fan projectors produce an actual 3D hologram. They just create the illusion of images being somewhat 3D because the fan blades can't really be seen when spinning, so the images seem to be floating in midair, but they're still just flat images. The flashing of the leds are timed with the spinning of the blades to create the illusion due to our eyes not being able to see fast moving objects, so the rapidly flashing leds all blend together so we see images and video. The images that are projected are still flat, but just look sort of 3D because they appear to be floating in space.The demo videos I've seen online show things like video of 3D rendered objects spinning and moving, but as far as I can tell, they're still just produced from flat, 2D video.

If you do use an led fan projector for your project, all you should need is a normal, 2D video file of the event horizon.

That makes sense. Shame though would have been cool if it was 3d. Given the size of the replica and the cost of the fan not sure its worth it at this point. I appreciate the info though since I think the tech is pretty cool.

 

[rjenkinsgb]

The closest to full moving 3D "hologram" is a rotating mirror system - a horizontal TFT screen with a 45' mounted mirror above it so the image is visible from the side, with a motor to rotate the mirror.

By displaying a 360' set of images synchronously with the mirror rotation, you get the effect of being able to see the object being displayed in 3D and being able to move around it, though without any vertical change.

Steadily changing the set of images displayed should give animation as well as the hologram effect.

For a limited viewing angle you could use two or more 45' mirrors offset to the rear of the display?

Example - I think the flicker is due to camera frame rate: