LIGHTGUIDE TAMPER SEAL
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United States of America Patent
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Issued Date -
Aug 4, 2016
app pub date -
Sep 12, 2014
filing date -
Sep 13, 2013
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Abstract
A tamper seal includes an optical waveguide arranged to guide a propagating light-beam along a propagation direction. First and second portions of the tamper seal are configured to be arranged on first and second parts, respectively, of an object, said first and a second parts being movable relative to each other. The first portion comprises an input coupler arranged to couple incident light into said optical waveguide. The second portion includes at least one outcoupling surface arranged to couple out at least partially light guided in the optical waveguide. The input coupler, optical waveguide and outcoupling surface are arranged to transmit light from the input coupler to the outcoupling surface. The optical waveguide is further designed to be at least partially disruptable between the two portions, wherein the optical waveguide loses or at least partially changes its optical guiding properties after its disruption.
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