Abstract: A wavelength beam combining device configured to combine collimated beams of different peak wavelengths whose central axes emitted in a first direction are arranged in a second direction intersecting the first direction, includes: an optical element configured to reduce a distance between beam central axes of the collimated beams and to cause the collimated beams with the reduced distance therebetween to exit; and first and second diffraction gratings. The first diffraction grating is disposed at a position where the collimated beams exiting from the optical element are received and to diffract the collimated beams in different directions depending on wavelengths to allow the collimated beams to enter the second diffraction grating. The second diffraction grating is configured to further diffract the collimated beams diffracted by the first diffraction grating to form a wavelength-combined beam and is configured to cause the wavelength-combined beam to exit.

Abstract: A positive active material for a lithium ion battery has a layered structure and contains nickel atoms and cobalt atoms. The positive active material has a ratio of a number of moles of the nickel atom to a total number of moles of metal atoms other than lithium that is 0.7 or more and less than 1. The positive active material has a disorder of lithium element determined by an X-ray diffraction method that is 6.2% or less.

Abstract: A light-emitting device includes: a light-emitting element configured to emit first light; a light-transmissive member covering an upper surface of the light-emitting element and including a wavelength conversion material configured to absorb a portion of the first light and emit second light; a light-scattering member disposed on the light-transmissive member, including a light-scattering material, and having a higher reflectance at a peak wavelength of the first light than at a peak wavelength of the second light; and a light-adjustment member located in or on the light-scattering member and having either (i) a higher absorptance at the peak wavelength of the second light than at the peak wavelength of the first light, or (ii) a higher reflectance at the peak wavelength of the second light than at the peak wavelength of the first light. A lateral surface of the light-transmissive member is exposed from the light-scattering member and the light-adjustment member.

Abstract: A method includes providing a ceramic substrate having a first arrangement portion recessed from a first planar portion; disposing a first conductive paste containing a first metal powder in the first arrangement portion; obtaining a first conductor by firing the first conductive paste; forming first recessed portions on a surface of the first conductor disposed in the first arrangement portion by polishing the first conductor and the ceramic substrate so that the first conductor and the first surface form a same plane; disposing a second conductive paste containing a second metal powder and a second organic resin binder in the first recessed portions; obtaining a second conductor by curing the second conductive paste; polishing the second conductor so that the second conductor and the first conductor form the same plane; and forming a first metal layer on surfaces of the first conductor and the second conductor.

Abstract: The light-emitting device includes a first light-emitting part including a first light-emitting element and a first light-transmissive member disposed over the first light-emitting element, a second light-emitting part including a second light-emitting element and a second light-transmissive member disposed over the second light-emitting element, a first light-shielding member disposed between a first lateral surface of the first light-transmissive member and a second lateral surface of the second light-transmissive member and containing a first additive, and a second light-shielding member disposed between a first element lateral surface of the first light-emitting element and a second element lateral surface of the second light-emitting element, holding the first light-emitting part and the second light-emitting part, and containing a second additive having a higher thermal conductivity than the first additive.

Abstract: A light-emitting device includes: a light-emitting unit having a light-emitting surface; a light guide member configured to guide light from the light-emitting unit, the light guide member having a first surface that includes an incident portion on which light from the light-emitting unit is incident, and a second surface from which the light exits, the second surface including a plurality of concentric protrusions; and a movement mechanism configured to move the light guide member such that the incident portion and the plurality of concentric protrusions move together relative to the light-emitting unit in a first direction that intersects a center axis of the light-emitting surface.

Abstract: A light source unit includes a display device configured to display an image, a reflective polarizing element on which light emitted from the display device is incident, a reflecting member, and a waveplate. The reflective polarizing element transmits a first polarized light and reflects a second polarized light. The reflecting member reflects, toward the reflective polarizing element, light transmitted by the reflective polarizing element. The waveplate is interposed in a portion of an optical path between the reflective polarizing element and the reflecting member. The optical path is of light emitted from the display device, transmitted by the reflective polarizing element, reflected by the reflecting member, and reflected by the reflective polarizing element. A normal of the waveplate is tilted with respect to a direction of the optical path transmitted by the waveplate partway from the reflective polarizing element toward the reflecting member.

Abstract: A planar light source includes a substrate, a reflective member having a plurality of openings and at least one slit, and a light source disposed in each of the openings. The plurality of openings are arranged in m rows along a first direction and in n columns along a second direction that intersects the first direction. The at least one slit includes at least one first slit arranged in a first region and intersecting a first virtual straight line at a prescribed position in the first region. The first virtual straight line is parallel to the first direction. The first region is located between one or more openings in a kth row (k is an integer equal to or greater than 1 and less than or equal to m?1) and one or more openings in a (k+1)th row and extends in the first direction.

Abstract: A method for manufacturing a light-emitting element includes: providing a semiconductor stacked body including a first semiconductor layer, an active layer, and a second semiconductor layer, formed in this order on a substrate; exposing a surface of the first semiconductor layer by removing the substrate; and forming a protective film on the surface of the first semiconductor layer by performing steps including: forming a first layer on the surface of the first semiconductor layer by chemical vapor deposition while introducing a source gas to a film formation chamber at a first flow rate, and forming a second layer on the first layer by chemical vapor deposition while introducing a source gas to the film formation chamber at a second flow rate, the second flow rate being less than the first flow rate.

Abstract: A light emitting device including a substrate having a substantially rectangular shape when viewed in plan view, light emitting elements arranged along a first long side of the substantially rectangular shape of the substrate, light transmissive members each disposed on an upper surface of each of the light emitting elements, and a cover member having a substantially rectangular shape when viewed in plan view. The cover member covering an upper surface of the substrate, and exposing upper surfaces of the light transmissive members. The device includes terminals exposed from the cover member. The terminals being arranged along a second long side of the substantially rectangular shape of the substrate, and being capable of individually driving the light emitting elements. When viewed in the plan view, a long side of the substantially rectangular shape of the cover member overlaps with at least one of the first and the second long sides.

Abstract: A light emitting device for emitting a given irradiation light pattern is provided. The light emitting device includes a plurality of light emitting elements configured to be individually turned on. The light emitting device is configured to emit at least one irradiation light pattern onto a road surface in accordance with a detected situation of a traffic object.

Abstract: An illumination device includes a light source module and a light reflective member. The light source module includes a substrate having a first surface and a plurality of light sources thereon, each light source emitting light including first light and second light having luminance lower than the first light. The light reflective member is disposed on a first surface side of the substrate and has a reflective surface. The reflective surface includes a first reflective surface to reflect the first light and a second reflective surface to reflect the second light. The second reflective surface is closer to the substrate than the first reflective surface is. Of the light emitted from one light source of the light sources, the first light reflected by the first reflective surface and the second light reflected by the second reflective surface are condensed at a condensing point located on the first surface side.

Abstract: An image display device includes: a circuit element; a first wiring layer electrically connected to the circuit element; a first insulating film covering the circuit element and the first wiring layer; a plug formed on the first insulating film and connected to the first wiring layer; a light-emitting element located on the plug, the light-emitting element comprising a first semiconductor layer connected to the plug, a light-emitting layer located on the first semiconductor layer, and a second semiconductor layer located on the light-emitting layer, the first semiconductor layer being of a first conductivity type, the second semiconductor layer being of a second conductivity type that is different from the first conductivity type; a second insulating film covering the first insulating film, the plug, and at least a portion of the light-emitting element; and a second wiring layer located on the second insulating film and connected to the light-emitting element.

Abstract: Provided is a method for producing an electrode active material capable of forming a non-aqueous secondary battery with superior durability and output characteristics. The method for producing an electrode active material for a non-aqueous secondary battery includes contacting a carbon material containing at least one selected from the group consisting of graphene, a carbon nanotube and carbon black with a one-electron oxidant having an oxidation-reduction potential of 0.2 V or more and 1.9 V or less to obtain at least one modified carbon material, and contacting the at least one modified carbon material with alkali-metal-transition-metal composite oxide particles.

Abstract: A light source device for irradiating two or more irradiation regions with light includes a plurality of light emitting parts, an optical lens, and a light converging member. The optical lens includes the first surface including a plurality of incident regions and the second surface including a plurality of emission regions. The light converging member includes a plurality of light entering portions and a plurality of light emission portions. The light converging member is located between the light emitting parts and the optical lens.

Abstract: Provided is a method for producing a semiconductor nanoparticle including preparing a mixture containing a Ag salt, a salt containing at least one of In and Ga, and an organic solvent; raising the temperature of the mixture to a raised temperature in a range of from 120° C. to 300° C.; and adding a supply source of S to the mixture at the raised temperature in such a manner that a ratio of a number of S atoms to a number of Ag atoms in the mixture increases at a rate of not more than 10/min.

Abstract: A light emitting element includes a support substrate, and first and second light emitting portions. Each of the first light emitting portion and the second light emitting portion includes a semiconductor layered body, an insulating film, first and second electrodes and first and second external connection portions. The first external connection portion provided in the first light emitting portion includes a first portion provided adjacent to the second external connection portion of the first light emitting portion in a first direction and provided adjacent to the first external connection portion of the second light emitting portion in a second direction, and the first portion has an inclined portion inclined with respect to one side of the semiconductor layered body on a side facing the first external connection portion provided in the second light emitting portion in the second direction.

Abstract: A planar light source has a plurality of light sources, a substrate, and a partitioning member. The partitioning member includes a first member provided with first partitioned parts each having a first bottom part and first oblique parts surrounding the first bottom part that are arranged on the substrate in a matrix, and a second member provided with second partitioned parts each having a second bottom part and second oblique parts surrounding the second bottom part that are arranged on the substrate in a matrix. The first member further has first outer oblique parts overlapping the second oblique parts located along the outer edge of the second member on the first member side. The first bottom parts and the second bottom parts each have a light source disposition opening, and the light sources are individually disposed on the substrate exposed in the light source disposition openings.

Abstract: A lens includes a cover part and an interposing member formed of a light-reflecting material. The cover part includes a lens part having a lateral side, a connection part constituting a lateral side wall extending from the lateral side, and a flange part having a lower surface disposed below the lateral side wall. The interposing member has an upper surface and an inner lateral surface. The upper surface is disposed on the lower surface of the flange part. The lens part and the interposing member define a recess having an opening facing downward. The lens part defines a bottom surface of the recess. The inner lateral surface defines a lateral surface of the recess, which defines the opening of the recess. The flange part extends outward from the opening. The lens part has a convex lens and a light-emitting surface with projections outward from the convex lens.

Abstract: A method of producing a SmFeN-based anisotropic magnetic powder, the method including preparing a SmFeN-based anisotropic magnetic powder before dispersion containing Sm, Fe, La, W, R, and N, wherein R is at least one selected from the group consisting of Ti, Ba, and Sr, and dispersing the SmFeN-based anisotropic magnetic powder before dispersion using resin-coated metal media or resin-coated ceramic media. A SmFeN-based anisotropic magnetic powder which contains Sm, Fe, La, W, R, and N, wherein R is at least one selected from the group consisting of Ti, Ba, and Sr, and has an average particle size that is at least 2.0 ?m but not more than 4.0 ?m, a residual magnetization ?r that is at least 152 emu/g, and an oxygen content that is not higher than 0.5% by mass.