Abstract: A metal separator is applied to a fuel cell. A method of producing the metal separator involves performing a plate processing step of forming a bead base, and a rubber seal forming step of providing a rubber seal by screen printing for the bead base formed in the plate processing step. The rubber seal forming step includes a first protrusion forming step of forming a first protrusion at the central part in the width direction of a top portion of the bead base, in a cross sectional view taken along a thickness direction of the rubber seal, and a second protrusion forming step of forming a second protrusion configured to cover the first protrusion after the first protrusion forming step.

Abstract: A method of producing a rubber seal includes placing a screen with an opening, above a workpiece including a base portion and a bead base protruding from the base portion and applying a liquid material for forming the rubber seal, onto a top part of the bead base through the opening. In the production, the liquid material is applied onto the top part by moving a squeegee along a surface of the screen in a state where a stopper portion is disposed at a position adjacent to the bead base within an area of the base portion and between the screen and the workpiece.

Abstract: An optical processing device includes a semiconductor optical device, and an optical device provided on the semiconductor optical device. The optical device includes one or more optical fibers and a holder having a supporting block, a reflecting plate, and an intermediate layer. The supporting block has first to third end surfaces at one end. The first end surface extends from a bottom surface of the holder to claddings of the optical fibers. The second end surface extends along an axis intersecting the first end surface. The third end surface is oblique with respect to the axis at an angle greater than zero degrees and less than 90 degrees. The optical fibers have facets exposed at the third end surface. The intermediate layer embeds roughness in the exposed facets. It has a refractive index comparable to that of the claddings of the optical fibers.

Abstract: An optical device includes one or more optical fibers and a holder having a supporting block, a reflecting plate, and an intermediate layer. The supporting block has a first to a third end surfaces at one end. The first end surface extends from a bottom surface of the holder to claddings of the optical fibers. The second end surface extends along a first axis intersecting the first end surface. The third end surface is oblique with respect to the first axis at an angle greater than zero degrees and less than 90 degrees. The optical fibers extend in the supporting block and is exposed to the third end surface. The reflecting plate is provided on the third end surface via the intermediate layer. Light from the optical fiber passes through the third end surface which has some roughness, and is reflected by a surface of the reflecting plate.

Abstract: An optical device includes one or more optical fibers and a holder having a supporting block, a reflecting plate, and an intermediate layer. The supporting block has a first to a third end surfaces at one end. The first end surface extends from a bottom surface of the holder to claddings of the optical fibers. The second end surface extends along a first axis intersecting the first end surface. The third end surface is oblique with respect to the first axis at an angle greater than zero degrees and less than 90 degrees. The optical fibers extend in the supporting block and is exposed to the third end surface. The reflecting plate is provided on the third end surface via the intermediate layer. Light from the optical fiber passes through the third end surface which has some roughness, and is reflected by a surface of the reflecting plate.

Abstract: A method for manufacturing an optical-assembly includes the steps of preparing an optical connector including a base having an optical waveguide and a first support block holding a first optical fiber, the base having first and second end surfaces; aligning the optical connector to the optical device, the first end surface of the base facing to the optical device, the first support block being fixed to the base in a removable manner; after aligning the optical connector, fixing the base to the optical device; after fixing the base, removing the first support block from the base; after removing the first support block, re-fixing a second support block to the base, the second end surface of the base facing to the second support block. The second support block has an optical fiber and a through hole. The base has a guide pin inserted to the through hole in the re-fixing step.

Abstract: An optical device comprises optical fibers and a holder. The holder includes one end portion, an other end portion, and a supporting portion extending in a direction of a first axis from the one end portion to the other end portion. The one end portion includes a first end face extending along a first reference plane intersecting with the first axis from a side of the holder to cladding regions of the optical fibers; a second end face extending along a second reference plane from the one end portion to the other end portion; and a third end face extending along a third reference plane inclined at an angle of less than 90 degrees and more than zero degrees relative to the first axis. The cladding regions of the optical fibers are disposed at the second end face. The optical fibers have respective tips disposed at the third end face.

Abstract: An optical device comprises optical fibers and a holder. The holder includes one end portion, another end portion, and a supporting portion extending in a direction of a first axis from the one end portion to the other end portion. The one end portion includes a first end face extending along a first reference plane intersecting with the first axis from a side of the holder to cladding regions of the optical fibers; a second end face extending along a second reference plane from the one end portion to the other end portion; and a third end face extending along a third reference plane inclined at an angle of less than 90 degrees and more than zero degrees relative to the first axis. The cladding regions of the optical fibers are disposed at the second end face. The optical fibers have respective tips disposed at the third end face.

Abstract: An optical signal processor including: optical fibers arranged in a first direction, each optical fiber having a side surface; a flexible holding member covering the side surfaces of the optical fibers; a first optical connector having a first end face and a second end face; a second optical connector having a third end face and a fourth end face; a supporting block disposed under the first optical connector; and an optical integrated circuit including optical couplers facing the third end face of the second optical connector and optical waveguides, the optical couplers being optically coupled to the optical fibers. The optical fibers extend from the second end face in a second direction. The optical fibers extend from the fourth end face in a third direction that intersects with the second direction. The flexible holding member has a bending portion located between the first optical connector and the second optical connector.

Abstract: An optical signal processor including: optical fibers arranged in a first direction, each optical fiber having a side surface; a flexible holding member covering the side surfaces of the optical fibers; a first optical connector having a first end face and a second end face; a second optical connector having a third end face and a forth end face; a supporting block disposed under the first optical connector; and an optical integrated circuit including optical couplers facing the third end face of the second optical connector and optical waveguides, the optical couplers being optically coupled to the optical fibers. The optical fibers extends from the second end face in a second direction. The optical fibers extend from the forth end face in a third direction that intersects with the second direction. The flexible holding member has a bending portion located between the first optical connector and the second optical connector.

Abstract: An optical branching/synthesizing device 20A includes an optical branching coupler group 25A and an optical combiner 26. The optical branching coupler group 25A includes a first-stage optical branching coupler 22 that receives a downstream optical signal Sd from an OLT device 12 at light input/output end 22a, and second-stage optical branching couplers 23 and 24 including light input/output ends 23b and 24a connected to light input/output ends 22c and 22d of the optical branching coupler 22 at the previous stage, respectively. A light input/output ends 23a, 23b, 24a, 24b of the optical branching couplers 23 and 24 transmit the downstream optical signal Sd to each ONU device 13 and receive upstream optical signals Su from the ONU devices 13. The optical combiner combines the upstream optical signals Su output from the light input/output ends 22b, 23a, and 24b of the optical branching couplers 22 to 24.

Abstract: A method for manufacturing an optical-assembly includes the steps of preparing an optical connector including a base having an optical waveguide and a first support block holding a first optical fiber, the base having first and second end surfaces; aligning the optical connector to the optical device, the first end surface of the base facing to the optical device, the first support block being fixed to the base in a removable manner; after aligning the optical connector, fixing the base to the optical device; after fixing the base, removing the first support block from the base; after removing the first support block, re-fixing a second support block to the base, the second end surface of the base facing to the second support block. The second support block has an optical fiber and a through hole. The base has a guide pin inserted to the through hole in the re-fixing step.

Abstract: An optical branching/synthesizing device 20A includes an optical branching coupler group 25A and an optical combiner 26. The optical branching coupler group 25A includes a first-stage optical branching coupler 22 that receives a downstream optical signal Sd from an OLT device 12 at light input/output end 22a, and second-stage optical branching couplers 23 and 24 including light input/output ends 23b and 24a connected to light input/output ends 22c and 22d of the optical branching coupler 22 at the previous stage, respectively. A light input/output ends 23a, 23b, 24a, 24b of the optical branching couplers 23 and 24 transmit the downstream optical signal Sd to each ONU device 13 and receive upstream optical signals Su from the ONU devices 13. The optical combiner combines the upstream optical signals Su output from the light input/output ends 22b, 23a, and 24b of the optical branching couplers 22 to 24.

Abstract: The present invention provides an optical transceiver with a function of the wavelength division multiplexing. The transceiver includes a receiver optical unit, a transmitter optical units and a substrate. Both optical unit includes a plurality of receiver optical subassemblies (ROSAs) or a plurality of transmitter optical subassemblies (TOSAs) and a plurality of wavelength selective filters. The ROSAs or the TOSAs in respective optical units is electrically connected with the circuit on the substrate by the flexible printed circuit (FPC) board with a plurality of branches, each connected to the ROSAs or the TOSAs, and a connecting portion fixed to the substrate.

Abstract: The present invention provides an optical transceiver with a function of the wavelength division multiplexing. The transceiver includes a receiver optical unit, a transmitter optical units and a substrate. Both optical unit includes a plurality of receiver optical subassemblies (ROSAs) or a plurality of transmitter optical subassemblies (TOSAs) and a plurality of wavelength selective filters. The ROSAs or the TOSAs in respective optical units is electrically connected with the circuit on the substrate by the flexible printed circuit (FPC) board with a plurality of branches, each connected to the ROSAs or the TOSAs, and a connecting portion fixed to the substrate.

Abstract: The present invention provides screening methods for agonists or antagonists of Sema6C using Plexin-A1, and tools for the screening and the like. It evaluates a case of making a recombinant protein having an extracellular domain of Semaphorin 6C contact a protein having an extracellular domain of Plexin-A1 by comparing it with a case of contacting a recombinant protein and a target substance having an extracellular domain of Semaphorin 6C, or the target substance with a protein having an extracellular domain of Plexin-A1. The evaluation will be carried out by the connectivity of a protein having an extracellular domain of Semaphorin 6C, a growth cone collapse activity of Plexin-A1 expressing cell, or a contractile activity of Plexin-A1 expressing cell.

Abstract: Method of manufacturing a metal gasket including a base plate having at least fluid passage holes and circular beads surrounding the fluid passage holes, the base plate being formed by providing a rubber coating layer on a surface of a metal plate with a base coat and an adhesive interposed therebetween. A metal plate having low-temperature age-hardening characteristics is used as the metal plate of the base plate. After the base coat is applied to the metal plate and dried at a temperature lower than a low aging temperature of the metal plate, press-working of the circular beads is performed on the metal plate. Thereafter, the metal plate is age-hardened while burning the base coat at the low aging temperature of the metal plate. A metal gasket having excellent durability and circular beads which are hardly broken even when crushed, is obtained.

Abstract: A piston for an internal combustion engine, the piston having a skirt part, comprises: a resinous coating layer formed on a surface of the skirt part; and a plurality of concaves regularly arranged in the resinous coating layer. The concaves are non-coated regions in which said resinous coating layer is not formed.

Abstract: An expansion graphite sheet of high thermal resistance includes an expansion graphite as a main component, and inorganic thermal resistance particles made of at least one selected from the group consisting of aluminum boride (AlB2 and/or AlB12), silicon boride (SiB6), zinc boric acid (2ZnO.3B2O3.3.5H2O) and phosphorous boride (PB). An exhaust gasket made of the expansion graphite sheet, in addition to the expansion graphite sheet, can exhibit high thermal (oxidization) resistance under a high temperature of 600–700° C.

Abstract: A metal gasket for a cylinder head has two base plates each constructed from a metal plate and layered over each other, an auxiliary plate constructed from a metal plate and interposed between the base plates, and hard metal-plated layers. The base plates each have cylinder holes, annular beads, coolant holes, and an outer peripheral bead. The cylinder holes correspond with the bore of each cylinder. The annular beads have an angled cross-sectional shape. The coolant holes correspond with a coolant jacket of the cylinder block and with a coolant hole of the cylinder head. The outer peripheral bead has a cross-sectional shape sloping on one side and surrounds the beads and the coolant holes. Each of the layers is extended from a position more radially inward than an annular bead of a base plate to a position radially outward.