In conventional holography, the hologram is formed by recording the interference fringes of two coherent beams using a photosensitive material. The amplitude and phase information of the original signal wave can be reconstructed correctly when reading the hologram. By introducing the polarization characteristics of light into conventional holography, more degrees of freedom can be provided for controlling optical information. However, in the reconstruction of polarization holography, although the amplitude and phase of the signal wave can be reconstructed correctly, the polarization information shows rich changes. This change is not only related to the polarization states and interference angles of various types beams in the recording and reconstruction stages, but also to the properties such as polarization response, diffraction efficiency of the photoreceptor materials.
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Source: Phys.org