Abstract: An optical connector comprising: first and second movable members 7, 8 held on an optical connector body 6 to be axially movable in a longitudinal direction; locking means for locking the first and second movable members when the first movable member is located at a predetermined locking position in a tip part of the optical connector body, and integrally moving the first and second movable members; and unlocking means formed in the optical connector body 6, and including a locking acting portion which acts on the locking means when the first movable member is located rearwardly of a predetermined unlocking position in a rear part of the optical connector body, to unlock the first and second movable members, and which locks the first and second movable members when the first movable member is located forwardly of the unlocking position, and a second movable member hooking portion 10 for inhibiting rearward movement of the second movable member after the first and second movable members are unlocked, and where

Abstract: An optical connector comprising: first and second movable members 7, 8 held on an optical connector body 6 to be axially movable in a longitudinal direction; locking means for locking the first and second movable members when the first movable member is located at a predetermined locking position in a tip part of the optical connector body, and integrally moving the first and second movable members; and unlocking means formed in the optical connector body 6, and including a locking acting portion which acts on the locking means when the first movable member is located rearwardly of a predetermined unlocking position in a rear part of the optical connector body, to unlock the first and second movable members, and which locks the first and second movable members when the first movable member is located forwardly of the unlocking position, and a second movable member hooking portion 10 for inhibiting rearward movement of the second movable member after the first and second movable members are unlocked, and where

Abstract: A water absorptive composition comprising a thermoplastic elastomer as a first component, a water-absorptive resin as a second component, and a third component selected from the group which consists of: a water-soluble resin; a hydrophilic compound selected from the group consisting of metal salt of carboxylic acid, polyhydric alcohol, amino alcohol, linear polyether, saccharide, and sugar alcohol; and a surface treating agent selected from the group consisting of sorbitan fatty acid ester, glycidyl ether of polyhydric alcohol, and silane coupling agent. The composition is suitably used for producing a water absorptive member for protecting optical fiber elements of an optical fiber cable.

Abstract: A multifiber optical connector plug capable of realizing low reflection and low insertion loss, without using the refractive index matching material. The multifiber optical connector plug includes a connector plug member made of a plastic material, having a connecting facet on which endfaces of the optical fibers to be connected with other optical fibers are arranged in a transverse direction between the guide pin insertion holes, with the endfaces of the optical fibers projecting out of the connecting facet, the connecting facet being inclined with respect to an axial direction along optical axes of the optical fibers by an angle which is larger than a total reflection critical angle of light beams transmitted through the optical fibers. The connecting facet may have a flat surface shape or a convex ellipsoidal surface shape.

Abstract: A water absorptive composition comprising a thermoplastic elastomer as a first component, a second component and a third component selected from the group which consists of: a water-soluble resin; a hydrophilic compound selected from the group consisting of metal salt of carboxylic acid, polyhydric alcohol, amino alcohol, linear polyether, saccharide, and sugar alcohol; and a surface treating agent selected from the group consisting of sorbitan fatty acid ester, glycidyl ether of polyhydric alcohol, and silane coupling agent. The composition is suitably used for producing a water absorptive member for protecting optical fiber elements of an optical fiber cable.

Abstract: An optical connector for joining exposed fiber ends of coated fibers and a method of manufacturing a pair of ferrules for the optical connector. The optical connector includes a pair of the ferrules each having a flange, the coated fiber and a metal pipe molded integrally with one another by using molding resin, a coupling pin fitted through holes of the ferrules, a sleeve for receiving the metal pipes of the ferrules, and a housing member for axially clamping the ferrules to each other.