Abstract
An improved method for holographically recording displacement through fiber optics is presented. The object is illuminated by focusing the exit end of a multimode fiber bundle on the test surface. The real image of the object is transmitted through a second coherent bundle to a photographic plate where it is recorded using a reference wave front. The resulting image-plane hologram is reconstructed in white light. Experimental results agree well with theory and demonstrate the potential of measuring displacement on surfaces far removed from the basic holographic setup; or, in remote areas of a structure where optical access is limited.
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References
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Gilbert, J.A., Schultz, M.E. & Boehnlein, A.J. Remote displacement analysis using multimode fiber-optic bundles. Experimental Mechanics 22, 398–400 (1982). https://doi.org/10.1007/BF02325407
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DOI: https://doi.org/10.1007/BF02325407