3 ms·

FYI, LASER's are not needed to make a Hologram. Dennis Gabor's original discovery of holography occurred years before Lasers, and was based on monochromatic sod

FYI, LASER's are not needed to make a Hologram. Dennis Gabor's original discovery of holography occurred years before Lasers, and was based on monochromatic sodium or mercury light passed through a pinhole... From: http://amasci.com/amateur/holo3.html http://amasci.com/amateur/holo3.html

mhalle 9y ago
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.