Abstract:Methods of contrast increasing of the interference patterns in digital holographic interferometry by numerical linear phase modulation and interpolation post-processing of digital focused-image holograms are discussed. It is shown that the linear phase modulation of the hologram leads to a shift of the object field spatial spectrum, whereas the step-in-interpolation procedure of the holograms leads to a broader spatial spectrum of the hologram. In both cases it becomes possible to separate an extended frequenc… Show more
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