Daniel Smalley, Hologram Expert From BYU

The 16:9 PODCAST IS SPONSORED BY SCREENFEED – DIGITAL SIGNAGE CONTENT I'm not sure why seeing all the product references lately to holograms makes me a little crazy, apart from the simple fact that none of them really meet the definition. It's not like that's the one term marketers abuse. We've seen bezel-less displays that had bezels. MicroLED displays that aren't actually microLED. And on and on. I don't entirely know what really does meet the definition, so I thought I'd ask an expert. Daniel Smalley is an associate professor of electrical engineering at Brigham Young University in Utah, and a genuine expert in the field. He's working, his CV says, to make the 3D displays of science fiction a reality, using "waveguide-based modulators and optical tractor beam technologies." The short summary is that we're not there yet, and in this conversation, we get into why that is - with the biggest reason being bandwidth and the immense computing power needed to genuinely make the holograms of Star Wars and Star Trek actually happen, and work. We also get into a discussion of the various products already on the market that have co-opted the hologram term, and also talk about the real world, practical applications for holograms. Daniel went to MIT and has his masters and a Ph.D, so he's approximately a billion times smarter than me. This talk gets technical in spots, but I tried valiantly to keep up! Subscribe to this podcast: iTunes * Google Play * RSS TRANSCRIPT Daniel, thank you for joining me. Can you explain your role at BYU and your interest in holograms?  Daniel Smalley: Certainly, I'm an Associate Professor of Electrical Engineering here at Brigham University. My research primarily has to do with advanced 3D displays, including holographic displays and volumetric displays.  Okay, and when you say you're doing research, what does that mean? Daniel Smalley: So it is our group's manifest destiny, as we see it, to recreate the displays of science fiction, specifically the Princess Leia projector from Star Wars and the Holodeck from Star Trek, and so research in my mind is the steps we take to get from where we are to those places  And where are we in those steps?  Daniel Smalley: On the holography end, as we'll talk about, I'm sure, the primary challenge now is that we can make little teeny tiny holographic video displays, but the bandwidth issues, the sheer computational power required to make big displays remain an obstacle. Some estimates have suggested that we will colonize Mars before we have the capacity to easily feed a big holographic display with all the pixels it's hungry for and on the other side, on the Princess Leia projector side, we're in a similar space, but with more hope. That is to say that we can make little teeny tiny Princess Leia projections, but I think we're not far away from getting moderate and maybe even large-size volumetric images in the near future. So let's do a level set here. How do you define holograms and holographic visuals?  Daniel Smalley: Yeah, that's an excellent question. So there have been meetings of the minds where we've discussed and debated what these things mean, and I think the best way to think about the different display families is that there are three of them. So a trifecta of holographic display.  The first is a “ray” family of displays, the second is a “wave” family of displays, and the third is a “point” family of displays. Now the ray displays are the displays we're already familiar with. These are lenticular displays, stuff that you might see at Best Buy or in a magazine. These crisscross rays of light and space form an image point that we perceive, what we would call a real image point. A holographic display is a step up from that. Instead of taking rays and intersecting them in the air, what it will do is it'll take its whole surface, so you'll be gazing at a screen and this whole surface is focusing light, it's curving away in front of a light, in order to fo