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Device for coupling radiation into an optical waveguide

  • US 4,378,143 A
  • Filed: 09/04/1980
  • Issued: 03/29/1983
  • Est. Priority Date: 09/25/1979
  • Status: Expired due to Term
First Claim
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1. An optical device for laterally input coupling radiation into a light waveguide from a member having a radiation transmitting zone, said device comprising said waveguide having a radiation conducting core of a predetermined cross-sectional area and being formed by a pair of coaxially aligned optical fiber parts, each part having a single end face obliquely extending in a plane at an angle to the axis of the waveguide and parallel to the end face of the other part, a reflective layer of a high reflectance occupying only a small portion of the total cross-sectional area of the core, said layer being disposed between said end faces and having opposite surfaces being engaged by the end faces to hold the layer on said angle as the remaining portions of the end faces abut each other to form said waveguide, a member having a radiation transmitting zone and means for arranging said member with the radiation transmitting zone being aligned with the reflective layer so that radiation from the member is coupled into the waveguide by being reflected by said layer.

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