Abstract: A base includes: a mount surface; a lateral wall located around the mount surface, the lateral wall including: a pair of first protrusions having first upper surfaces and located opposite to each other in a first direction that is parallel to a side of the mount surface, wherein each first protrusion has a same height from the mount surface, a pair of second protrusions having second upper surfaces and located opposite to each other in a second direction which is perpendicular to the first direction, wherein each second protrusion has a height from the mount surface less than the height of the first protrusion; and at least one conduction region disposed on at least one of the first upper surfaces and/or at least one of the second upper surfaces.

Abstract: A light-emitting device includes: a base including: a mount surface, and a lateral wall located around the mount surface, the lateral wall including: a pair of first protrusions located opposite to each other in a first direction which is parallel to a side of the mount surface, and a pair of second protrusions located opposite to each other in a second direction which is perpendicular to the first direction, the second protrusions being provided lower than the first protrusions; one or more light-emitting elements mounted on the mount surface of the base; a first light-transmissive member sealing a space in which the one or more light-emitting elements are mounted; and one or more wires connecting to the one or more light-emitting elements, the one or more wires being bonded on conduction regions provided on at least one of upper surfaces of the second protrusions.

Abstract: A plurality of light emitting devices include first and second light-emitting devices. The first light-emitting device includes: a first package, first semiconductor laser elements sealed in the first package, and a first lens member having lens surfaces. The second light-emitting device includes a second package having a same outer shape as the first package, one or more second semiconductor laser elements sealed in the second package, and a second lens member having one or more lens surfaces. The first semiconductor laser elements include a semiconductor laser element to emit first light having a color different from light emitted from any of the second semiconductor laser elements. A curvature of the lens surface of the first lens member to transmit the first light is the same as a curvature of one of the lens surfaces of the second lens member.

Abstract: A mounting member includes a substrate, a first metal layer, and a second metal layer. The substrate has an insulating property and has a first surface and a second surface. The substrate has a shape in which a length in a second direction perpendicular to a first direction is greater than a width in the first direction in a plan view. The first metal layer is arranged on the first surface. The second metal layer is arranged on the second surface. A width of the second metal layer is smaller than a width of the first metal layer in the first direction. A difference between a length of the first metal layer and a length of the second metal layer in the second direction is smaller than a difference between the width of the first metal layer and the width of the second metal layer in the first direction.

Abstract: A light-emitting device includes: a base portion; a plurality of light-emitting elements disposed on an upper surface of the base portion, the plurality of light-emitting elements including: a first light-emitting element configured to emit first light from a first emitting surface, and a second light-emitting element configured to emit second light from a second emitting surface; and one or more reflective members disposed on the upper surface of the base portion and configured to reflect upward the first light and the second light. The one or more reflective members include: a first reflective surface configured to reflect the first light, a second reflective surface configured to reflect upward the first light that has been reflected at the first reflective surface, and a third reflective surface configured to reflect the second light.

Abstract: A light-emitting device includes: a base portion; a first light-emitting element disposed on the base portion; a frame portion having inner lateral surfaces surrounding at least a portion of the base portion and extending upward further than the upper surface, wherein the frame portion includes: a first stepped portion extending partially along the one or more inner lateral surfaces in a first direction and having a width in a second direction perpendicular to the first direction in a top view, and a first metal film and a second metal film disposed on an upper surface of the first stepped portion, wherein the first metal film and the second metal film are separated from each other by a first boundary region that includes a portion that extends in the first direction; and a first protecting element disposed on the first and second metal films and spanning in the second direction.

Abstract: A light-emitting device includes: a base including: a mount surface, and a lateral wall located around the mount surface, the lateral wall including: a pair of first protrusions located opposite to each other in a first direction which is parallel to a side of the mount surface, and a pair of second protrusions located opposite to each other in a second direction which is perpendicular to the first direction, the second protrusions being provided lower than the first protrusions; one or more light-emitting elements mounted on the mount surface of the base; a first light-transmissive member sealing a space in which the one or more light-emitting elements are mounted; and one or more wires connecting to the one or more light-emitting elements, the one or more wires being bonded on conduction regions provided on at least one of upper surfaces of the second protrusions.

Abstract: A light-emitting device includes: a base including a mount surface, and a lateral wall located around the mount surface, the lateral wall having a first upper surface and a second upper surface located at different heights from the mount surface; one or more light-emitting elements mounted on the mount surface of the base; a light-receiving element configured to receive a portion of light emitted from the one or more light-emitting elements; a first light-transmissive member bonded to the first upper surface and sealing a space in which the light-emitting elements are mounted; and a second light-transmissive member bonded to the second upper surface and supporting the light-receiving element.

Abstract: A light-emitting device includes: a base portion; a plurality of light-emitting elements disposed on an upper surface of the base portion, the plurality of light-emitting elements including: a first light-emitting element configured to emit first light from a first emitting surface, and a second light-emitting element configured to emit second light from a second emitting surface; and one or more reflective members disposed on the upper surface of the base portion and configured to reflect upward the first light and the second light. The one or more reflective members include: a first reflective surface configured to reflect the first light, a second reflective surface configured to reflect upward the first light that has been reflected at the first reflective surface, and a third reflective surface configured to reflect the second light.

Abstract: A light-emitting module includes a wiring substrate, first and second bases, three or more first submounts, four or more second submounts, three or more first light-emitting elements, and four or more second light-emitting elements. The first and second bases are bonded to and electrically connected to the wiring substrate. The first submounts are arranged side by side along a first alignment direction on the first base, and the second submounts are arranged side by side along a second alignment direction on the second base. A number of the second submounts is greater than a number of the first submounts by one or more. The first and second light-emitting elements are arranged respectively on the first and second submounts. A length of each of the first submounts in the first alignment direction is greater than a length of each of the second submounts in the second alignment direction.

Abstract: A base member for a light emitting device includes a bottom part and a frame part. The frame part has an upper surface, a lower surface, and a step portion. The frame part has a bonding surface bonded to the bottom part, and defining a planar surface of the step portion at a lower surface side, first and second inner surfaces, a first planar surface defining a planar surface of the step portion at an upper surface side, and first and second electrode layers electrically connected to each other, the second electrode layer being disposed on the first planar surface while the first electrode layer being not disposed on the first planar surface. The step portion extends along an entire periphery of the frame part in a bottom view, and the step portion does not extend along the entire periphery of the frame part in a top view.

Abstract: A light detecting element is realized in which a length thereof is reduced in a direction perpendicular to a direction in which light detecting regions are disposed side by side. A light detecting element includes a light detecting surface provided with a plurality of light detecting regions disposed side by side in a first direction and a plurality of wiring regions electrically connected to the plurality of light detecting regions. Of the plurality of wiring regions, a plurality of the wiring regions connected to a plurality of the light detecting regions are provided in an end region that is a region excluding a central region at the light detecting surface.

Abstract: A base member includes a lower portion and a lateral portion. The lateral portion includes a first lateral surface, a second lateral surface not adjacent to the first lateral surface, and a third lateral surface adjacent to the first lateral surface, and first to third step portions. The first step portion is arranged inward of the first lateral surface along a portion or an entirety of the first lateral surface, and has a first upper surface provided with a wiring pattern. The second step portion is arranged inward of the second lateral surface along a portion or an entirety of the second lateral surface, and has a second upper surface provided with a wiring pattern. The third step portion is arranged inward of the third lateral surface along only a portion of the third lateral surface, and has a third upper surface provided with a wiring pattern.

Abstract: A light-emitting device includes light-emitting elements to emit first and second lights; a package having a disposition surface on which the light-emitting elements are disposed and a light extracting surface through which the first and second lights are to be emitted; a wave plate bonded to the light extracting surface of the package at a position on which a main portion of the first light is to be incident and a main portion of the second light is not to be incident; a lens member having an incidence surface on which the first light transmitted through the wave plate and the second light emitted from the light extracting surface are to be incident; and bonding parts disposed between the package and the lens member. The wave plate is disposed between the package and the lens member without being in contact with the lens member.

Abstract: A light-emitting device includes: a base including a mount surface, and a lateral wall located around the mount surface, the lateral wall having a first upper surface and a second upper surface located at different heights from the mount surface; one or more light-emitting elements mounted on the mount surface of the base; a light-receiving element configured to receive a portion of light emitted from the one or more light-emitting elements; a first light-transmissive member bonded to the first upper surface and sealing a space in which the light-emitting elements are mounted; and a second light-transmissive member bonded to the second upper surface and supporting the light-receiving element.

Abstract: A base member for a light emitting device includes a bottom part and a frame part. The frame part has an upper surface, a lower surface, and a step portion. The frame part has a bonding surface bonded to the bottom part, and defining a planar surface of the step portion at a lower surface side, first and second inner surfaces, a first planar surface defining a planar surface of the step portion at an upper surface side, and first and second electrode layers electrically connected to each other, the second electrode layer being disposed on the first planar surface while the first electrode layer being not disposed on the first planar surface. The step portion extends along an entire periphery of the frame part in a bottom view, and the step portion does not extend along the entire periphery of the frame part in a top view.

Abstract: A light emitting device includes a semiconductor laser element and a base member. The base member includes a bottom part, a frame part, and first and second electrode layers. The frame part forms a frame surrounding the semiconductor laser element. An area within an intersection line between the first inner surface and the bonding surface of the frame part has a size larger than a size of the arrangement surface of the bottom part. An area within an intersection line between the second inner surface and the bonding surface of the frame part has a size smaller than the size of the arrangement surface. The planar surface of the frame part intersects at least a part of the second inner surface. The planar surface and the second inner surface form a step portion on an inner side of the frame. The second electrode layer is disposed on the planar surface.

Abstract: A light emitting device includes a semiconductor laser element and a base member. The base member includes a bottom part, a frame part, and first and second electrode layers. The frame part forms a frame surrounding the semiconductor laser element. An area within an intersection line between the first inner surface and the bonding surface of the frame part has a size larger than a size of the arrangement surface of the bottom part. An area within an intersection line between the second inner surface and the bonding surface of the frame part has a size smaller than the size of the arrangement surface. The planar surface of the frame part intersects at least a part of the second inner surface. The planar surface and the second inner surface form a step portion on an inner side of the frame. The second electrode layer is disposed on the planar surface.

Abstract: A maintenance plan formulation system formulates a plan for maintaining an industrial machine used to conduct a specific operation. The maintenance plan formulation system includes first measuring means, second measuring means, and a maintenance plan formulation device. The first measuring means measures a value of information which varies by causing the industrial machine to operate for a specific job. The second measuring means measures a value of information which varies by causing the industrial machine to operate for a job other than the specific job. The maintenance plan formulation device formulates a plan for maintaining the industrial machine on the basis of the values of information measured by the first measuring means and the second measuring means.

Abstract: The present invention provides a liquid surface detection device 1 in which corrosion is restrained even when liquid having conductivity is used so that a longer lifespan is achieved, including a liquid surface detection sensor 2 that outputs a signal indicating a variation in liquid level as a variation in resistance value by the sliding movement of a contact point 2a on an electrode connected to a resistor 2b, and a control unit 4 that controls supply and stops a supply of electric power to the liquid surface detection sensor 2 at predetermined intervals, in which a vehicle state determination unit that determines a state of a vehicle is provided and the control unit 4 controls the duration to stop the supply of electric power to the liquid surface detection sensor 2 when the vehicle state determination unit determines that the vehicle is in a traveling state.