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nature : a photographer to record the reflectivity of an object (or transmission), all beams in the new camera information technology. Using ordinary camera lens imaging principle, the photographic record reflect the object's surface perturbation light intensity changes as the plane. And Holography not only records the photographer to the reflective optical intensity, but also records the reflection of light wave phase, can be strongly realistic three-dimensional images. Holography by the bunches and bunches of reference beam are photographed object on the beam reflection on the superposition photosensitive film interference pattern formed, called Hologram (hologram). Holograms do not see itself is the original objects are photographed images of the apparent only when a bouquet of the original reference to the same laser beam through the hologram, can be the same as the original objects with a three-dimensional image of the flu. Holography not only enable us to get real, three-dimensional art appreciation, but the information stored in it, deformation metrology, optical information processing more applications. In addition to laser holography, there ultrasonic holography, microwave holography, in the medical, aviation, surveying and other aspects of important applications.
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