Abstract: There is provided a polymer compound having excellent transparency and excellent heat resistance, a high refractive index, an excellent solubility in various solvents, and a low viscosity and excellent handling properties when the polymer compound is dissolved in a solvent; and a production method of the polymer compound; and a polymer composition containing the polymer compound. And there is also included an aroylbiphenyl compound of Formula (1): [in Formula (1), X is a halogen atom, and R1 is a hydrogen atom or a group of Formula (2a) or Formula (2b); and in Formula (2a) and Formula (2b), R2 and R3 are independently a hydrogen atom or a C1-6 alkyl group]; a polymer compound obtained by using the aroylbiphenyl compound; and a thermocurable film forming polymer composition comprising: as a component (A), the polymer compound, and as a component (B), a crosslinkable compound.

Abstract: An optical connector that is assembled onto a terminal of an optical fiber cable including tension bodies. The optical connector includes a housing, a ferrule that is provided in the housing, and a fixing cap that is mounted on the housing. The housing includes a fixing portion of which an outer peripheral surface is provided with a screw portion. While the tension bodies leading from the terminal of the optical fiber cable are interposed between the housing and the fixing cap, the fixing cap is screwed onto and fixed to the fixing portion.

Abstract: A method of butting and connecting a first optical fiber and a second optical fiber in an optical connector comprises placing said optical connector that holds said first optical fiber in wherein an optical fiber connection tool; mounting said optical fiber holder on a holder mounting base of a front end bevel processing tool; processing a front end face of said second optical fiber such that said front end face of said second optical fiber is beveled relative to the surface perpendicular to the optical fiber axis direction; transferring said optical fiber holder to said holder support base; and moving said optical fiber holder toward said optical connector along said guide part, and butting and connecting the beveled front end face of said second optical fiber to the front end face of said first optical fiber such that their bevel directions are aligned.

Abstract: Provided is a method for confirming optical fibers connection in a connection part in an optical connector, including: allowing light to pass through a first optical fiber and allowing cladding mode light to disappear; and detecting a difference in light intensity in the connection part between before and after the light from the first optical fiber enters a second optical fiber disposed in the optical connector.

Abstract: An optical connector includes a connector body that has a first optical fiber housed in advance in a ferrule so as to project from a back end of the ferrule opposite to the connecting end surface and an anchoring fixture that anchors a second optical fiber that is to be optically connected to the first optical fiber, and by pressing the anchoring fixture into the connector body while the second optical fiber is anchored in this anchoring fixture, the anchoring fixture and the connector body are connected to optically connect the first optical fiber and the second optical fiber, and the connecting portion that connects the anchoring fixture and the connector body form a movable connecting portion that is adapted to vary the direction of the anchoring fixture with respect to the connector body.

Abstract: The invention is an optical fiber sheet obtained by adhering together at least two sheets with an optical fiber placed therebetween, and placing a reinforcing tube over a portion of the optical fiber extending from an edge of the sheets, wherein the reinforcing tube is fixed to the sheets by bonding, with the reinforcing tube inserted between the sheets located up and below by an appropriate distance from an edge of the sheets.

Abstract: In order to avoid a frequent multiple crossing in an optical fiber in a sheet and attach the optical connector near a marginal end of the sheet while maintaining a sufficient extra length and more extra length for attaching the optical fibers, in the optical fiber sheet 6, an optical fiber 5 as an extra length section in the optical fiber path is disposed on three-layer wiring planes which are formed by attaching four sheets 1, 2, 3, and 4. Notched sections 2a and 3a are formed in the intermediate layers 2 and 3. The optical fiber 5 communicates from a first wiring layer to a second wiring layer via the notched section 2a so as to communicate from the second wiring layer to a third wiring layer via the notched section 3a.

Abstract: An optical connector includes a connector body that has a first optical fiber housed in advance in a ferrule so as to project from a back end of the ferrule opposite to the connecting end surface and an anchoring fixture that anchors a second optical fiber that is to be optically connected to the first optical fiber, and by pressing the anchoring fixture into the connector body while the second optical fiber is anchored in this anchoring fixture, the anchoring fixture and the connector body are connected to optically connect the first optical fiber and the second optical fiber, and the connecting portion that connects the anchoring fixture and the connector body form a movable connecting portion that is adapted to vary the direction of the anchoring fixture with respect to the connector body.

Abstract: An optical connector includes a connector body that has a first optical fiber housed in advance in a ferrule so as to project from a back end of the ferrule opposite to the connecting end surface and an anchoring fixture that anchors a second optical fiber that is to be optically connected to the first optical fiber, and by pressing the anchoring fixture into the connector body while the second optical fiber is anchored in this anchoring fixture, the anchoring fixture and the connector body are connected to optically connect the first optical fiber and the second optical fiber, and the connecting portion that connects the anchoring fixture and the connector body form a movable connecting portion that is adapted to vary the direction of the anchoring fixture with respect to the connector body.

Abstract: A tool for an optical connector including a clamping portion for clamping an optical fiber between clamping elements, the tool including: first and second insertion members, respectively including separately extractable first and second distal ends, wherein the first and second distal ends maintain the clamping elements in an open state by being wedged therebetween from outside the clamping portion, so that the optical fiber is movable between the clamping elements; first and second insertion member operating portions, respectively separately connected to proximal ends of the first and second insertion members, that individually extract the first and second distal ends of the first and second insertion members from between the clamping elements; and a stopper portion against which the optical connector is pressed when the first and second insertion members are extracted from between the clamping elements.

Abstract: An optical connector includes a connector body that has a first optical fiber housed in advance in a ferrule so as to project from a back end of the ferrule opposite to the connecting end surface and an anchoring fixture that anchors a second optical fiber that is to be optically connected to the first optical fiber, and by pressing the anchoring fixture into the connector body while the second optical fiber is anchored in this anchoring fixture, the anchoring fixture and the connector body are connected to optically connect the first optical fiber and the second optical fiber, and the connecting portion that connects the anchoring fixture and the connector body form a movable connecting portion that is adapted to vary the direction of the anchoring fixture with respect to the connector body.

Abstract: An optical fiber connecting tool is provided in which an optical fiber connecting tool 5 is used which has a ferule 7, a connecting structure 10 which has two clamping sections 18, 19 which are disposed in a ferule 7. A pre-installed optical fiber 6 and a newly installed optical fiber 17 are clamped in a butt-connected condition by a clamping section 18. The newly installed optical fiber 17 is clamped by the other clamping section 19. An optical fiber connecting tool 1 is provided which has an open/close member 2 which is detachably disposed on the clamping section 18 and another open/close member 3 which is detachably disposed on the another clamping section 19 such that the both of the open/close members 2, 3 can be operated independently.

Abstract: A tool for an optical connector including a clamping portion for clamping an optical fiber between clamping elements, the tool including: first and second insertion members, respectively including separately extractable first and second distal ends, wherein the first and second distal ends maintain the clamping elements in an open state by being wedged therebetween from outside the clamping portion, so that the optical fiber is movable between the clamping elements; first and second insertion member operating portions, respectively separately connected to proximal ends of the first and second insertion members, that individually extract the first and second distal ends of the first and second insertion members from between the clamping elements; and a stopper portion against which the optical connector is pressed when the first and second insertion members are extracted from between the clamping elements.

Abstract: An optical fiber connecting tool for an optical connector which houses a ferule, a first optical fiber mounted in the ferule and extending from a back end of the ferule, and a second optical fiber abutted and connected to the first optical fiber. The optical connector includes a clamping portion, provided at a back portion of the ferule opposite to a distal end surface for abutment connection and having half split elements, for maintaining connection between the first optical fiber and the second optical fiber by clamping the first optical fiber and the second optical fiber in a space between the half split elements using elastic force of a spring.

Abstract: The invention is an optical fiber sheet obtained by adhering together at least two sheets with an optical fiber placed therebetween, and placing a reinforcing tube over a portion of the optical fiber extending from an edge of the sheets, wherein the reinforcing tube is fixed to the sheets by bonding, with the reinforcing tube inserted between the sheets located up and below by an appropriate distance from an edge of the sheets.

Abstract: An optical fiber connecting tool for an optical connector which houses a ferule, a first optical fiber mounted in the ferule and extending from a back end of the ferule, and a second optical fiber abutted and connected to the first optical fiber. the optical connector includes a clamping portion, provided at a back portion of the ferule opposite to a distal end surface for abutment connection and having half split elements, for maintaining connection between the first optical fiber and the second optical fiber by clamping the first optical fiber and the second optical fiber in a space between the half split elements using elastic force of a spring.

Abstract: An optical fiber connecting tool is provided in which an optical fiber connecting tool 5 is used which has a ferule 7, a connecting structure 10 which has two clamping sections 18, 19 which are disposed in a ferule 7. A pre-installed optical fiber 6 and a newly installed optical fiber 17 are clamped in a butt-connected condition by a clamping section 18. The newly installed optical fiber 17 is clamped by the other clamping section 19. An optical fiber connecting tool 1 is provided which has an open/close member 2 which is detachably disposed on the clamping section 18 and another open/close member 3 which is detachably disposed on the another clamping section 19 such that the both of the open/close members 2, 3 can be operated independently.

Abstract: In order to avoid a frequent multiple crossing in an optical fiber in a sheet and attach the optical connector near a marginal end of the sheet while maintaining a sufficient extra length and more extra length for attaching the optical fibers, in the optical fiber sheet 6, an optical fiber 5 as an extra length section in the optical fiber path is disposed on three-layer wiring planes which are formed by attaching four sheets 1, 2, 3, and 4. Notched sections 2a and 3a are formed in the intermediate layers 2 and 3. The optical fiber 5 communicates from a first wiring layer to a second wiring layer via the notched section 2a so as to communicate from the second wiring layer to a third wiring layer via the notched section 3a.