Abstract: An optical fiber cable branch member includes a branch member main body, a cable-fixing portion which holds and fixes, onto the branch member main body, an end portion of a jacket of an optical fiber cable including a first optical fiber core bundle and the jacket which coats an outer circumference of the first optical fiber core bundle, and includes a tension resistance member buried in a cable longitudinal direction, a tube-fixing portion which fixes, onto the branch member main body, a plurality of protective tubes which respectively cover and protect respective outer circumferences of a plurality of second optical fiber core bundles obtained by branching the first optical fiber core bundle extending from the end portion of the jacket, and a main body-fixing portion which fixes the branch member main body onto an object to be attached.

Abstract: An optical connector protecting cap includes a projecting pulling piece to which a drawing out force is applied to pull out a cap from an optical connector, the projecting pulling piece protruding from a front end wall that covers in one end in an axis line of a cylindrical body placed on the outside of the optical connector.

Abstract: An optical connector protecting cap includes a projecting pulling piece to which a drawing out force is applied to pull out a cap from an optical connector, the projecting pulling piece protruding from a front end wall that covers in one end in an axis line of a cylindrical body placed on the outside of the optical connector.

Abstract: An identification display device which is provided in a work unit in which a plurality of work locations are arranged in rows, and which displays for identifying a designated location selected from the work locations, the identification display device includes a database which stores address information of the respective work locations; light-display section which is provided respectively on each of the work locations, and which emits a visible light which contains the address information of the work location in which the light-display section is arranged; a photoreceptor which transmits a photoreception signal which contains at least the address information contained in the light from the light-display section, when the light is received; and a confirmation section which receives the photoreception signal from the photoreceptor, and determines whether or not the address information contained in the photoreception signal matches the address information of the designated location obtained from the database.

Abstract: This optical connector holder includes a holder body into which optical connectors are inserted, connector housing recesses are formed on the holder body and caps which fit together with said optical ferrules of said optical connectors that are inserted into said connector housing recess and which cover their connection end faces, wherein said caps separate from said optical ferrules and remain on said holder body side when said optical connectors are withdrawn from said connector housing recesses.

Abstract: A holding member includes a flared tubular body and collectively holds a plurality of unused optical fibers provided with optical connectors within an optical distribution frame. The tubular body has a rectangular cross section and includes an elongated rectangular lower opening and an upper opening wider than the lower opening. A part of sidewalls of the tubular body is formed to serve as an openable cover. The cover is first opened; the optical fibers provided with the optical connectors are accommodated in the tubular body; and then the cover is closed.

Abstract: A holding member includes a flared tubular body and collectively holds a plurality of unused optical fibers provided with optical connectors within an optical distribution frame. The tubular body has a rectangular cross section and includes an elongated rectangular lower opening and an upper opening wider than the lower opening. A part of sidewalls of the tubular body is formed to serve as an openable cover. The cover is first opened; the optical fibers provided with the optical connectors are accommodated in the tubular body; and then the cover is closed.

Abstract: An identification display device which is provided in a work unit in which a plurality of work locations are arranged in rows, and which displays for identifying a designated location selected from the work locations, the identification display device includes a database which stores address information of the respective work locations; light-display section which is provided respectively on each of the work locations, and which emits a visible light which contains the address information of the work location in which the light-display section is arranged; a photoreceptor which transmits a photoreception signal which contains at least the address information contained in the light from the light-display section, when the light is received; and a confirmation section which receives the photoreception signal from the photoreceptor, and determines whether or not the address information contained in the photoreception signal matches the address information of the designated location obtained from the database.

Abstract: This optical connector holder includes a holder body into which optical connectors are inserted, connector housing recesses are formed on the holder body and caps which fit together with said optical ferrules of said optical connectors that are inserted into said connector housing recess and which cover their connection end faces, wherein said caps separate from said optical ferrules and remain on said holder body side when said optical connectors are withdrawn from said connector housing recesses.

Abstract: An optical device comprises a first refractive index distribution (RID) type lens, having one end face ground diagonally, first and second ports connected to the diagonally ground end face, an optical functional element connected to another end face of the first RID type lens, a second RID type lens, having one end face ground diagonally, and another end face placed so as to face the end face of the first RID type lens through the optical functional element, and a third port connected to the diagonally ground end face. An optical path from the first port reflected by the optical functional element to the second port, wherein the optical path length of the reflected light through the first RID type lens is equal to an optical path length of transmitted light from the first port through the optical functional element through the second RID type lens to the third port.

Abstract: An optical functional component is provided in which alignment of optical fibers is simplified, a gap between an end face of the optical fiber and an end face of a lens is minimized, and stability of performance is improved. An optical functional component comprises a first refractive index distribution type lens, one end face of which is ground diagonally, first and second ports connected to the diagonally ground end face, an optical functional element connected to an other end face of the first refractive index distribution type lens, a second refractive index distribution type lens, one end face of which is ground diagonally, and another end face placed so as to face the end face of the first refractive index distribution type lens through the optical functional element, and a third port connected to the diagonally ground end face.