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Light Guide Device, Measurement System, and Method for Producing a Light Guide Device

  • US 20180252635A1
  • Filed: 08/17/2016
  • Published: 09/06/2018
  • Est. Priority Date: 09/11/2015
  • Status: Active Grant
First Claim
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1. A light guide apparatus for guiding a first light beam between a light source and a measuring unit for measuring a gas concentration or substance concentration, the light guide apparatus comprising:

  • a light guide including;

    at least one input coupling portion configured to couple-in the first light beam and to face the light source; and

    an output coupling portion configured to decouple the first light beam and to face the measuring unit,wherein the light guide is configured to guide the first light beam between the at least one input coupling portion and the output coupling portion via total-internal reflection at an interface to a fluid or material surrounding the light guide and having a first refractive index that is lower than a second refractive index of the light guide; and

    a holding device configured to hold the light guide in the fluid such that at least a main proportion of a surface of the light guide contacts the fluid.

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