“…Although in the development of holography we can find numerous heroes and even the odd villain, the truth is that there were three main protagonists [5][6][7][8][9]. Dennis Gabor, a Hungarian engineer based in England, inventor of holography in 1947 and who received the Nobel Prize in Physics in 1971 "for his invention and development of the holographic method" [10]. However, Gabor's original idea would have remained a white elephant [11], a superfluous object without any application, if it had not been for the appearance of two new actors on the scene: Yuri Denisyuk in the former Soviet Union and, above all, Emmett Leith in the United States.…”