> I was hoping to see some sort of atomic-scale structure that shifted the frequencies of a tiny amount of infrared light just enough for our visual system to p

> I was hoping to see some sort of atomic-scale structure that shifted the frequencies of a tiny amount of infrared light just enough for our visual system to pick it up. That's almost what it says it does. I think you took the word filter too literally. > "Our technology is able to transform infrared light, normally invisible to the human eye, and turn this into images people can clearly see—even at distance. It sounds like it might display the image on a thin screen rather than shift the light into the visible spectrum, but it was light on details.