Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.

Abstract: Provided is an optical resin capable of suppressing the occurrence of birefringence due to stress such as internal stress and external stress. An optical resin, in which, regarding a 13C-NMR spectrum of the resin, when a range in which a chemical shift is 141 ppm or higher and 147 ppm or lower is defined as a first range, and a range in which a chemical shift is 135 ppm or higher and 141 ppm or lower is defined as a second range, a ratio of a peak area of a peak in the first range to a peak area of a peak in the second range is 0.55 or less.

Abstract: Supporting tables 8, 9 for supporting both edges 90a, 90b of a veneer 90 are arranged when both edges 90a, 90b are scarfed using circular saws 40a, 41a. Supporting tables 8, 9 include pressing units 56, 57 for pressing both edges 90a, 90b, circular saw contacting sections 54, 55 for receiving the circular saws 40a, 41a, and auxiliary conveyors 60, 62 for transporting both edges 90a, 90b in a transporting direction TD. Pressing units 56, 57 are configured to press both edges 90a, 90b against at least the auxiliary conveyors 60, 62. Auxiliary conveyors 60, 62 are arranged adjacent to the circular saw contacting sections 54, 55. Both edges 90a, 90b transported in the transporting direction TD are pressed by the pressing units 56, 57, reducing a friction acting on both edges 90a, 90b in the direction opposite to the transporting direction TD.

Abstract: An optical polymer material includes an alternating copolymer made of a monomer of a styrene derivative and a monomer of a maleimide derivative, and has a nonlinear property in which the photoelastic coefficient of the optical polymer material decreases to a predetermined value with increase in composition ratio of the styrene derivative, and rises above the predetermined value with further increase in composition ratio of the styrene derivative. A composition ratio of the styrene derivative is within a predetermined range. An absolute value of the photoelastic coefficient is equal to or smaller than a first absolute value within the predetermined range of the composition ratio, and an absolute value of the intrinsic birefringence is equal to or smaller than a second absolute value of the optical polymer material within the predetermined range of the composition ratio.

Abstract: An optical transmission system includes: a first optical transmission line to which an optical signal having a predetermined wavelength is input; a second optical transmission line; and a connection portion that optically connects the first optical transmission line with the second optical transmission line, in which, when a product of a scattering loss of the optical signal and a length is 6 dB or less and a Gaussian beam emitted from a single-mode optical fiber is input by center excitation, the first optical transmission line performs output while enlarging a beam diameter by three times or more, and in the connection portion, the first optical transmission line and the second optical transmission line are optically connected via a gap.

Abstract: Scarf faces 92a, 92b are machined at a heeling angle ?2 on a veneer 90 by adjusting the heeling angle ?2 for a desired camber h using the following Equation (1): h = R 2 · sin ? ? 2 - sin 2 ? ? 2 · R 2 - t 2 ( 1 + i 2 ) 4 ( 1 ) With the configuration, double cutting of the veneer 90 by a circular saw 20 can be effectively prevented. Since the camber h is set desirably, the risk can be reduced that the scarf faces 92a, 92b only partially join each other, and a space can be secured to retain an adhesive Ad between arc concavities 91, 91. Thus, when the veneers 90 are joined together at the scarf faces 92a, 92b, the adhesive Ad is unlikely to seep out onto the surfaces of the veneers 90. As a result, the scarf faces 92a, 92b can be properly joined together.

Abstract: Provided is a method for efficiently producing an N-alkylmaleimide-based copolymer which has an excellent optical characteristic and excellent heat resistance, and also relates to an N-alkylmaleimide-based copolymer which has an excellent optical characteristic, excellent heat resistance, and excellent molding fluidity. In an aspect of the present invention, an N-alkylmaleimide-based copolymer is produced as a particulate product by precipitation polymerization in which radical copolymerization of monomers including 20% by weight to 95% by weight of a specific N-alkylmaleimide and 5% by weight to 80% by weight of a styrene compound is carried out in a specific polymerization solvent.

Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.

Abstract: A plastic optical fiber 10 of the present disclosure includes: a core 11; and a cladding 12 disposed on an outer circumference of the core 11. The plastic optical fiber 10 has a length of 30 m or less. The core 11 has a diameter of 30 ?m or more and 100 ?m or less. Of the plastic optical fiber 10, a transmission loss at a wavelength of 850 nm is 70 dB/km or more and 500 dB/km or less, and a transmission band at a wavelength of 850 nm is 30 MHz·km or more and 600 MHz·km or less.

Abstract: A batch-molding multi optical transmission sheet assembly includes a batch-molding multi optical transmission sheet, a housing member, and a fixing element. The batch-molding multi optical transmission sheet includes a sheet-like covering part made of plastic, and a plurality of optical transmission regions, inside the covering part, including a core region made of plastic that is disposed to extend along an extending direction of the covering part and a clad region made of plastic that surrounds an outer circumference of the core region, the optical transmission regions being arranged in a line in substantially parallel with each other along a principal surface of the covering part. The housing member includes a disposition hole in which at least one end part of the batch-molding multi optical transmission sheet is housed. The fixing element fixes the batch-molding multi optical transmission sheet and the housing member.

Abstract: A translucent resin composition comprises a transparent resin, and a natural fiber having a birefringence ?n of 0.013 to 0.15 and an average particle size of 2 to 100 ?m. The translucent resin composition contains 1 to 20 parts by mass of natural fiber with respect to 100 parts by mass of transparent resin. The translucent resin composition is used for depolarization. The natural fiber is an animal fiber.

Abstract: A batch-molding multi optical transmission sheet assembly includes a batch-molding multi optical transmission sheet, a housing member, and a fixing element. The batch-molding multi optical transmission sheet includes a sheet-like covering part made of plastic, and a plurality of optical transmission regions, inside the covering part, including a core region made of plastic that is disposed to extend along an extending direction of the covering part and a clad region made of plastic that surrounds an outer circumference of the core region, the optical transmission regions being arranged in a line in substantially parallel with each other along a principal surface of the covering part. The housing member includes a disposition hole in which at least one end part of the batch-molding multi optical transmission sheet is housed. The fixing element fixes the batch-molding multi optical transmission sheet and the housing member.

Abstract: It is an object to provide a method for efficiently producing an N-alkylmaleimide-based polymer that has an excellent optical characteristic, excellent heat resistance, and excellent mechanical strength. A method for producing an N-alkylmaleimide-based polymer in accordance with an aspect of the present invention includes using an oil-soluble radical polymerization initiator to carry out suspension polymerization, in an aqueous medium in the presence of at least one dispersant selected from the group consisting of a nonionic compound having no hydrogen bonded to oxygen or nitrogen, a polyacrylate salt, and a polyalkylene glycol, with respect to a monomer mixture consisting of 20% by weight to 100% by weight of N-alkylmaleimide and 0% by weight to 80% by weight of other copolymerizable monomers, the N-alkylmaleimide being represented by the following general formula (1): where R represents a C1-C12 linear alkyl group, a C3-C12 branched alkyl group, or a C3-C6 cyclic alkyl group.

Abstract: Supporting tables 8, 9 for supporting both edges 90a, 90b of a veneer 90 are arranged when both edges 90a, 90b are scarfed using circular saws 40a, 41a. Supporting tables 8, 9 include pressing units 56, 57 for pressing both edges 90a, 90b, circular saw contacting sections 54, 55 for receiving the circular saws 40a, 41a, and auxiliary conveyors 60, 62 for transporting both edges 90a, 90b in a transporting direction TD. Pressing units 56, 57 are configured to press both edges 90a, 90b against at least the auxiliary conveyors 60, 62. Auxiliary conveyors 60, 62 are arranged adjacent to the circular saw contacting sections 54, 55. Both edges 90a, 90b transported in the transporting direction TD are pressed by the pressing units 56, 57, reducing a friction acting on both edges 90a, 90b in the direction opposite to the transporting direction TD.

Abstract: An optical transmission system includes an optical signal transmitter, an optical signal receiver, and an optical transmission path. Further, the optical transmission path includes a first optical transmission path that has a product of a scattering loss and a length of 6 dB or less and outputs a beam with a beam diameter being enlarged by three times or more when the Gaussian beam emitted from a single-mode optical fiber is input by center excitation, and a second optical transmission path that is optically connected to the first optical transmission path, is longer than the first optical transmission path, has a transmission loss of 100 dB/km or less, and outputs a beam with a beam diameter being enlarged by less than three times when the Gaussian beam emitted from a single-mode optical fiber is input by center excitation.

Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.

Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.

Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.

Abstract: Scarf faces 92a, 92b are machined at a heeling angle ?2 on a veneer 90 by adjusting the heeling angle ?2 for a desired camber h using the following Equation (1): h = R 2 · sin ? ? 2 - sin 2 ? ? 2 · R 2 - t 2 ( 1 + i 2 ) 4 ( 1 ) With the configuration, double cutting of the veneer 90 by a circular saw 20 can be effectively prevented. Since the camber h is set desirably, the risk can be reduced that the scarf faces 92a, 92b only partially join each other, and a space can be secured to retain an adhesive Ad between arc concavities 91, 91. Thus, when the veneers 90 are joined together at the scarf faces 92a, 92b, the adhesive Ad is unlikely to seep out onto the surfaces of the veneers 90. As a result, the scarf faces 92a, 92b can be properly joined together.

Abstract: An integrally molded multi-optical transmission sheet includes: a sheet-like coated portion formed of plastic; and a plurality of optical transmission regions having a core region formed of plastic, and a clad region formed of plastic and surrounding an outer periphery of the core region, which are provided inside the coated portion to extend along an extending direction of the coated portion, wherein the plurality of optical transmission regions are arranged in a row substantially parallel to each other along a main surface of the coated portion, and in a case where light is incident from one end face side of the plurality of optical transmission regions and transmitted toward the other end face side, a M2 value of emitted light is 1.7 or more.