Hologram: It reproduces the image of a colorful woman where the photograph produces a three-dimensional image and contains information about the intensity and phase of the radiation reflected, transmitted, or diffracted by the photographed object. [It is obtained, gen., using the coherent radiation of a laser whose light is divided so that part of it illuminates the object, and part falls directly onto a photographic plate; the superposition of the two beams produces interference patterns, and the image is reproduced by illuminating the photograph with laser light.]