LIGHTGUIDE TAMPER SEAL

摘要

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.

主权项

1. A tamper seal comprising an optical waveguide arranged to guide a propagating light-beam along a propagation direction, comprising at least a first portion and a second portion intended to be respectively arranged on a first part and on a second part of an object, said first and a second parts being movable relative to each other,
wherein said optical waveguide is a multimode waveguide comprising at least a waveguide core that has its smallest dimension, defined perpendicular to said propagation direction, greater than 10 μm and smaller than 10 mm, and in that said first portion comprises an input coupler arranged to couple incident light into said optical waveguide and wherein said second portion comprises at least one outcoupling surface arranged to couple out at least partially light guided in the optical waveguide, wherein said input coupler, said optical waveguide and said outcoupling surface are arranged so as to transmit light from said input coupler to said outcoupling surface, said optical waveguide being further designed to be at least partially disruptable between said two portions, said optical waveguide losing or changing at least partially its optical guiding properties after its disruption.