Questions tagged [hologram]
"Hologram" has evolved in meaning over the past 40 years. To Gabor it meant a diffractive "whole picture" recorded by optical interference. Today its meaning very loosely includes much more: HOE's, any image with diffractive effects, and even practically any 3D image regardless of how it works. But the preferred meaning is "a pattern recorded via wave interference", with "wave" being light, sound, radio, or quantum mechanical particles.