ABSTRACT
Holography is the process of recording a wave on a square-law medium and later releasing the same. A wave can carry information in the form of the modulation of amplitude, phase, and polarization. This information can be stored using holography. The basic idea was conceived by Gabor, who was attempting to improve the performance of the electron microscope. For more than a decade, holography remained practially dormant. Its revival came with the advent of the laser. Since then it has found applications in almost all branches of science, technology, and engineering.
