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Optical transmission element

  • US 4,641,916 A
  • Filed: 12/20/1984
  • Issued: 02/10/1987
  • Est. Priority Date: 01/10/1984
  • Status: Expired due to Term
First Claim
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1. An optical transmission element (AD) comprising:

  • a fibrous light waveguide (LW);

    a cushion layer (PS) engaging and surrounding said waveguide;

    a hard sheath (HL) surrounding and protecting said waveguide and cushion layer;

    a glide layer (GS) disposed between and engaging each of said sheath (HL) and said cushion layer (PS) for accommodating movement between said sheath (HL) and cushion layer (PS), wherein the physical properties of said sheath include an elastic modulus (E) greater than 2000 N/mm2 and a coefficient of thermal expansion less than 0.8×

    10-4 /K.

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