Abstract: A coat removing method of removing a coat of a coated optical fiber 3 made of a glass fiber 3a and the coat of polyimide resin 3b covering the glass fiber 3a includes holding the coated optical fiber 3 with fiber clamps 5 and 7 at two locations spaced by a predetermined distance in a length direction of the coated optical fiber 3, applying tension to the coated optical fiber 3 in the length direction, pressing a coat removal blade 29 to the coated optical fiber 3 in the tension-applied state in a direction crossing the length direction, to bend the coated optical fiber 3, and moving the coat removal blade 29 in the length direction along the coated optical fiber 3 in the bent state, thereby removing the coat.

Abstract: A fusion splicing apparatus fusion-splices end faces 1a and 3a of a pair of optical fibers 1 and 3 to each other. The apparatus includes a mirror shaft 21 provided with a mirror 23 that is arranged between the end faces 1a and 3a of the pair of optical fibers 1 and 3 that are faced toward and spaced away from each other and is movable between a first position to reflect an image of the end face 1a and a second position to reflect an image of the end face 3a, a first camera 25 that takes the image of the end face 1a reflected in the first position, and a second camera 27 that takes the image of the end face 3a reflected in the second position.

Abstract: A coat removing method of removing a coat of a coated optical fiber 3 made of a glass fiber 3a and the coat of polyimide resin 3b covering the glass fiber 3a includes holding the coated optical fiber 3 with fiber clamps 5 and 7 at two locations spaced by a predetermined distance in a length direction of the coated optical fiber 3, applying tension to the coated optical fiber 3 in the length direction, pressing a coat removal blade 29 to the coated optical fiber 3 in the tension-applied state in a direction crossing the length direction, to bend the coated optical fiber 3, and moving the coat removal blade 29 in the length direction along the coated optical fiber 3 in the bent state, thereby removing the coat.

Abstract: A fusion splicing apparatus includes discharge electrodes 13 and 15 to discharge-heat and fusion-splice end faces 5a and 7a of optical fibers 1 and 3, fiber holders 17 and 19 to hold the optical fibers 1 and 3, V-groove blocks 21 and 23 to receive, position, and fix parts of the optical fibers 1 and 3 on the end face sides of the fiber holders 17 and 19, V-groove-block moving mechanisms 33 and 35 to move the V-groove blocks 21 and 23 so as to shift an axial center of the optical fibers 1 and 3 from a straight line between the discharge electrodes 13 and 15, and holder moving mechanisms 37 and 39 to move the fiber holders 17 and 19 so as to shift the axial center of the optical fibers 1 and 3 from the straight line between the discharge electrodes 13 and 15.

Abstract: A coat removing method of removing a coat of a coated optical fiber 3 made of a glass fiber 3a and the coat of polyimide resin 3b covering the glass fiber 3a includes holding the coated optical fiber 3 with fiber clamps 5 and 7 at two locations spaced by a predetermined distance in a length direction of the coated optical fiber 3, applying tension to the coated optical fiber 3 in the length direction, pressing a coat removal blade 29 to the coated optical fiber 3 in the tension-applied state in a direction crossing the length direction, to bend the coated optical fiber 3, and moving the coat removal blade 29 in the length direction along the coated optical fiber 3 in the bent state, thereby removing the coat.

Abstract: A fusion splicing apparatus includes discharge electrodes 13 and 15 to discharge-heat and fusion-splice end faces 5a and 7a of optical fibers 1 and 3, fiber holders 17 and 19 to hold the optical fibers 1 and 3, V-groove blocks 21 and 23 to receive, position, and fix parts of the optical fibers 1 and 3 on the end face sides of the fiber holders 17 and 19, V-groove-block moving mechanisms 33 and 35 to move the V-groove blocks 21 and 23 so as to shift an axial center of the optical fibers 1 and 3 from a straight line between the discharge electrodes 13 and 15, and holder moving mechanisms 37 and 39 to move the fiber holders 17 and 19 so as to shift the axial center of the optical fibers 1 and 3 from the straight line between the discharge electrodes 13 and 15.

Abstract: A fusion splicing apparatus fusion-splices end faces 1a and 3a of a pair of optical fibers 1 and 3 to each other. The apparatus includes a mirror shaft 21 provided with a mirror 23 that is arranged between the end faces 1a and 3a of the pair of optical fibers 1 and 3 that are faced toward and spaced away from each other and is movable between a first position to reflect an image of the end face 1a and a second position to reflect an image of the end face 3a, a first camera 25 that takes the image of the end face 1a reflected in the first position, and a second camera 27 that takes the image of the end face 3a reflected in the second position.

Abstract: The present invention provides a cation-polymerizable resin composition comprising (A) a multi-branched polyether polyol obtained from a ring-opening reaction of (a1) a hydroxyalkyloxetane and (a2) an epoxy compound having one epoxy group, (B) an alicyclic epoxy compound having at least two alicyclic epoxy groups, and (C) an acid generator, which may be used in various uses including, for example, an adhesive agent or tackiness agent for optical elements, various kinds of coating agents and the like.

Abstract: Disclosed is a silver halide photographic photosensitive material which includes a support and at least one silver halide photosensitive layer on the support, wherein the average equivalent sphere diameter of the silver halide of the silver halide photosensitive layer is 0.30 ?m or less, the silver halide photosensitive layer includes four or more kinds of silver halide grains having mutually different average equivalent sphere diameters, and the thickness between a surface of the support at a side at which the silver halide photosensitive layer is provided and a surface of the silver halide photosensitive layer at a side opposite to the support is 10 ?m or less.

Abstract: An ultraviolet curable resin composition, which comprises a cationic photopolymerization initiator (B) and a urethane prepolymer (A) having a structure represented by the general formula (1); (wherein R1 and R2 each independently represent an alkylene group, R3, R4 and R5 each independently represent an alkyl group or hydrogen atom, R6 and R7 each independently represent an alkylene group having 2 to 4 carbon atoms, a represents 0 or 1, and b and c each independently represent an integer of 0 to 10).

Abstract: Disclosed is a silver halide photographic photosensitive material which includes a support and at least one silver halide photosensitive layer on the support, wherein the average equivalent sphere diameter of the silver halide of the silver halide photosensitive layer is 0.30 ?m or less, the silver halide photosensitive layer includes four or more kinds of silver halide grains having mutually different average equivalent sphere diameters, and the thickness between a surface of the support at a side at which the silver halide photosensitive layer is provided and a surface of the silver halide photosensitive layer at a side opposite to the support is 10 ?m or less.

Abstract: A silver halide photographic material, includes transparent support having provided thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, wherein the average equivalent-sphere diameter of the silver halide grains contained in each layers is 0.35 ?m or less, and an upper layer of the green-sensitive emulsion layer contains a fixed magenta dye, an upper layer or the red-sensitive emulsion layer contains a fixed cyan dye, and the green-sensitive layer contains a pyrazolotriazole, pyrazolopyrrole or 4-thio-pyrazolo-5-one coupler having a specific structure, and an image-recording method uses the photographic material.

Abstract: An ultraviolet curable resin composition, which comprises a cationic photopolymerization initiator (B) and a urethane prepolymer (A) having a structure represented by the general formula (1); (wherein R1 and R2 each independently represent an alkylene group, R3, R4 and R5 each independently represent an alkyl group or hydrogen atom, R6 and R7 each independently represent an alkylene group having 2 to 4 carbon atoms, a represents 0 or 1, and b and c each independently represent an integer of 0 to 10).

Abstract: The present invention provides a cation-polymerizable resin composition comprising (A) a multi-branched polyether polyol obtained from a ring-opening reaction of (a1) a hydroxyalkyloxetane and (a2) an epoxy compound having one epoxy group, (B) an alicyclic epoxy compound having at least two alicyclic epoxy groups, and (C) an acid generator, which may be used in various uses including, for example, an adhesive agent or tackiness agent for optical elements, various kinds of coating agents and the like.

Abstract: A silver halide photographic material, includes transparent support having provided thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, wherein the average equivalent-sphere diameter of the silver halide grains contained in each layers is 0.35 ?m or less, and an upper layer of the green-sensitive emulsion layer contains a fixed magenta dye, an upper layer or the red-sensitive emulsion layer contains a fixed cyan dye, and the green-sensitive layer contains a pyrazolotriazole, pyrazolopyrrole or 4-thio-pyrazolo-5-one coupler having a specific structure, and an image-recording method uses the photographic material.

Abstract: An image-forming method of recording a digital image data in resolution of 2,000 dpi or more, the method comprising: recording a digital image data on a silver halide photographic material with little deterioration.

Abstract: An image-forming method of recording a digital image data in resolution of 2,000 dpi or more, the method comprising: recording a digital image data on a silver halide photographic material with little deterioration.

Abstract: A silver halide photographic light-sensitive material having one or more layers including at least one light-sensitive silver halide emulsion layer on a support, wherein any of the layers formed on the support contains a compound represented by the following formula (1) and a fluorine-containing surfactant (in the formula (1), R1 represents an alkyl group or alkenyl group having 6-25 carbon atoms, ml represents an integer of 0-30, n1 represents an integer of 0-4, a represents 0 or 1, and Z1 represents OSO3M or SO3M, where M represents a cation). There is provided a silver halide photographic light-sensitive material that shows superior antistatic property and can be stably produced.

Abstract: A silver halide photographic light-sensitive material having one or more layers including at least one light-sensitive silver halide emulsion layer on a support, wherein at least one of the layers contains at least one compound represented by R1-Z1 (R1 is an unsubstituted or hydroxy-substituted alkyl having 6-24 carbon atoms or an unsubstituted alkenyl group having 6-24 carbon atoms, and Z1 is OSO3M or SO3M, where M is a cation) and a fluorine-containing surfactant. There is provided a silver halide photographic light-sensitive material that shows superior antistatic property and can be stably produced.