Đo lường quang học P6

Holography Holography is the synthesis of interference and diffraction. In recording a hologram, two waves interfere to form an interference pattern on the recording medium. When reconstructing the hologram, the reconstructing wave is diffracted by the hologram. When looking at the reconstruction of a 3-D object, it is like looking at the real object. It is therefore said that: ‘A photograph tells more than a thousand words and a hologram tells more than a thousand photographs’. Although holography requires coherent light, it was invented by Gabor back in 1948, more than a decade before the invention of the laser....