Abstract: An optical module includes a substrate, an optical element, and an optical coupling module. The substrate includes a glass cloth constituted of glass threads serving as weft and warp. An outer edge of the substrate has a rectangular shape defined by a pair of first side surfaces in a predetermined direction and a pair of second side surfaces in a direction orthogonal to the predetermined direction. The weft is inclined with respect to the first side surfaces and the second side surfaces. The warp is inclined with respect to the first side surfaces and the second side surfaces. A cavity is formed in the substrate. At least a part of the optical coupling module is accommodated in the cavity. A side surface of the cavity includes an inclined region inclined with respect to an extension direction of the weft and an extension direction of the warp.

Abstract: This optical module includes a cable including an optical fiber, and a connector module. The connector module includes: a circuit board having a first surface and a second surface; a metal housing in which the circuit board is disposed and which includes a plate-shaped portion facing the second surface; a resin housing in which the metal housing is disposed; and a heat transfer member which is disposed on the second surface. The plate-shaped portion of the metal housing includes a first region overlapping with the heat transfer member in plan view, and a second region located around the first region. The first region is closer to the second surface than the second region, and is in contact with the heat transfer member. A heat insulating region is disposed between the first region and the resin housing.

Abstract: An optical module includes a substrate, an optical element, and a lens module. The optical element is mounted on the substrate. The lens module includes an outer surface and an inner surface facing each other and a lens provided on the inner surface so as to be optically coupled to the optical element and optically couples an optical fiber with the optical element through the lens. The lens module is mounted on the substrate such that the inner surface faces the substrate and is attached to the substrate with an adhesive introduced into a gap between the inner surface and the substrate. The optical module is provided with an inflow prevention structure that prevents inflow of the adhesive to an optical axis of the lens between the substrate and the lens module and between the lens and the adhesive.

Abstract: An optical module includes a substrate, an optical element, an optical coupling module, and an adhesive. The substrate includes a glass cloth therein. The optical element is mounted on the substrate. The optical coupling module is configured to be optically coupled to the optical element. The adhesive fixes the optical coupling module to the substrate. A cavity recessed from a first main surface of the substrate toward a second main surface of the substrate so as to include a bottom portion is formed in the substrate. At least a part of the optical coupling module is accommodated in the cavity. The glass cloth includes a protruding portion protruding into the cavity from a side surface of the cavity. The protruding portion is stuck into the adhesive positioned between the side surface and the optical coupling module.

Abstract: An optical-electric composite cable includes a cable unit, at least one metal wire, and a sheath. The cable unit includes at least one optical fiber and a twisted pair wire twisted with the at least one optical fiber. The at least one metal wire is disposed around the cable unit. The sheath surrounds the cable unit and the at least one metal wire.

Abstract: An optical module includes a substrate, an optical element, and a lens module. The substrate has a first surface and a second surface facing each other. The optical element is mounted on the substrate. The lens module has a lens configured to be optically coupled to the optical element and optically couples an optical fiber and the optical element to each other via the lens. The substrate is provided with a cavity recessed from the first surface toward the second surface to have a bottom portion, and at least a part of the lens module is housed inside the cavity.

Abstract: An optical-electric composite cable includes a cable unit, at least one metal wire, and a sheath. The cable unit includes at least one optical fiber and a twisted pair wire twisted with the at least one optical fiber. The at least one metal wire is disposed around the cable unit. The sheath surrounds the cable unit and the at least one metal wire.

Abstract: A tool monitoring system for detecting a tool failure of a tool employed in a tool machine, comprising artificial signal generating unit for generating a predetermined artificial tool failure signal simulating the acoustic emission signal obtained in an actual failure of the tool, acoustic emission transducing unit adapted to be mounted on the tool machine near the tool and driven by the artificial signal generating unit for applying the artificial tool failure signal to the tool machine, acoustic emission sensing unit mounted on the tool machine near the tool so as to receive, in a setting mode of the system where the transducing unit is mounted on the machine, the applied artificial tool failure signal from the acoustic emission transducing unit through the tool machine and, in a monitoring mode of the system where the tool is operated, an acoustic emission from the tool, and signal processing unit for analyzing an output signal generated from the acoustic emission sensing unit to detect the tool failure of