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  Introduction: The term holography comes from the Greek meaning whole writing. It is a technique of recording objects and regenerating images in three dimensions. It is a two-step process:  An object illuminated by coherent light is made to produce interference fringes in photosensitive material. Reillumination of the developed interference pattern by light of the same wavelength produces a three-dimensional image of the original object. Dennis Gabor of the Imperial College of Science and Technology developed this technique in 1948. He was awarded the Nobel Prize in Physics in 1976 for his three-dimensional lensless method of photography (holography). [2] Dove hologram used on some credit cards [7] Basic principle: The basic principle of holography is recording the phase and amplitude of the light scattered from different parts of the object.  The phase recording helps to record the depth of the material.  It is a unique way of recording the interference pattern produced by light wave