I scanned the article but I can't say that I figured out how it works. They say that "stereographic holography" means you only reconstruct the intensity of the

I scanned the article but I can't say that I figured out how it works. They say that "stereographic holography" means you only reconstruct the intensity of the wavefronts of the light, but not the phase. They use a pulsed laser to write into the photorefractive material, and then it's viewed by illuminating with LEDs. I think to figure out exactly what and how they are writing with the laser, you need to go through the references. The article is pretty lacking in detail.