Abstract
Two identical holograms are set in parallel with each other giving some amount of lateral shear. The total flux of light which is diffracted from these holograms in the direction of the first order shows the auto-correlation of the complex amplitude recorded in the holograms. As a merit of this method the sinusoidal amplitude modulation of the flux to be measured is automatically introduced by the shear with a constant speed. The method is applied to the measurement of optical transfer function of a spatial phase filter.
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