A new shearing interferometer using hologram is introduced. The hologram is taken with two reference beams polarized perpendicularly to each other and shearing is achieved through rotating the hologram during the reconstruction process. The amount of shear is adjustable by changing the azimuth. A theoretical illustration for the shearing process is given, and experimental applications of the method to the diffusion process of the solute in an acqueous solution and also to the measurement of the change of the refractive index are described.
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