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Optical receptacle, ferrule, and plug ferrule

  • US 10,409,008 B2
  • Filed: 10/03/2017
  • Issued: 09/10/2019
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. A ferrule containing an optical fiber which conducts light, the ferrule including a foreign matter movement suppressor in an end surface of the ferrule on an end of the ferrule to be connected to an optical transmission member, the foreign matter movement suppressor being a region of the end surface of the ferrule having a surface roughness which is larger than a surface roughness of a central portion of the end surface, the end surface being polished into a convex spherical configuration, the foreign matter movement suppressor suppresses movement of foreign matter moving from an outer circumferential portion of the ferrule toward the central portion of the end surface caused when the ferrule is moved relative to the optical transmission member, whereinthe region of the end surface which is the foreign matter movement suppressor does not directly contact the optical transmission member when the ferrule is connected to the optical transmission member,at least a part of the region of the end surface which is the foreign matter movement suppressor has a tapered configuration extending to an outer circumferential portion of the ferrule, andan average height of a surface of the region of the end surface which is the foreign matter movement suppressor is 0.305 micrometers or more and 0.606 micrometers or less, and a skewness of the surface of the region of the end surface which is the foreign matter movement suppressor is −

  • 0.2 or less.

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