But Gabor's holograms were not display holograms of the type we think of. The long coherence length of the laser was essential to display holography as pioneere

But Gabor's holograms were not display holograms of the type we think of. The long coherence length of the laser was essential to display holography as pioneered by Leith and Upatnieks at University of Michigan in the mid 1960s.