Abstract:Abstract.A correlation-coefficient based ring-filtering method for centering a concentric circle fringe is proposed. The image of a non-diffracting beam, whose cross section is a concentric circle fringe, is recorded by a matrix array image sensor and downloaded onto a computer. The image is then processed by ring-filtering, with a center position in the zeroth order interference area of the non-diffracting image. Next, we change the center position of the ring-filtering and calculate the coherence coefficient… Show more
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