A light source device includes a light source section configured to emit first light, a light guide body configured to propagate a part of the first light, a wavelength conversion section including a phosphor which is excited by another part of the first light and transmitted though the light guide body, and emits second light, and a light combining section configured to combine the part of the first and second lights together. The light guide body includes a first and a second side surface opposed to each other, and the wavelength conversion section includes a third and a fourth side surface opposed to each other. The light source section is disposed at a position opposed to the first side surface, and the light guide body and wavelength conversion section are disposed in parallel to each other so that the second and third side surfaces are opposed to each other.

Provided are a light emitting element capable of maintaining high fluorescent intensity over a long period, and a fluorescent light source device. The light emitting element according to the present invention includes: a substrate; a reflection layer formed of a material containing Ag or Al, formed on the upper layer of the substrate; a diffusion prevention layer formed of a layer at least part of which being crystallized, the diffusion prevention layer being formed in contact with a surface of the reflection layer on a side opposite to the substrate; an enhanced reflection layer formed in contact with a surface of the diffusion prevention layer on a side opposite to the substrate; and a fluorescent body layer formed on the upper layer of the enhanced reflection layer.

A modular circuit includes a female plug-in module and a female plug-in connector connected to the female plug-in module. The female plug-in module includes an N-hedron. A plurality of first sockets or first pins are provided on each surface of the N-hedron. The first sockets or first pins on different surfaces are electrically connected in series or in parallel to form a plurality of circuits connected in series or in parallel on the N-hedron. N is greater than or equal to 2. The female plug-in connector includes a connector body, and second sockets or second pins are respectively provided at two ends of the connector body. The second sockets or second pins at the two ends of the connector body are electrically connected in series or in parallel.

A modular circuit includes a female plug-in module and a female plug-in connector connected to the female plug-in module. The female plug-in module includes an N-hedron. A plurality of first sockets or first pins are provided on each surface of the N-hedron. The first sockets or first pins on different surfaces are electrically connected in series or in parallel to form a plurality of circuits connected in series or in parallel on the N-hedron. N is greater than or equal to 2. The female plug-in connector includes a connector body, and second sockets or second pins are respectively provided at two ends of the connector body. The second sockets or second pins at the two ends of the connector body are electrically connected in series or in parallel.

A wheel-shaped wavelength conversion member includes a first porous ceramic layer having a porosity of at least 20% by volume, a phosphor layer formed on a first principal surface of the first porous ceramic layer, a ceramic heat dissipation layer having a porosity of 20% or less by volume provided on a second principal surface of the first porous ceramic layer opposite the first principal surface, and a second porous ceramic layer having a porosity of at least 20% by volume provided on a surface of the heat dissipation layer opposite the first porous ceramic layer.

A light fixture includes a light source, a wavelength-conversion material, and a reflector. The light source is configured to emit a first radiation, and has a front surface and a back surface. The wavelength-conversion material is arranged under the front surface and configured to convert the first radiation to a second radiation which has a first portion not able to reach the reflector and a second portion able to reach the reflector. The reflector is arranged over the back surface and configured to reflect the second portion away from the light source without passing through the wavelength-conversion material. The reflector has an end distant from the light source and is arranged in an elevation different from that of the wavelength-conversion material.

The invention describes a laser-based light source (100) which is adapted to use the angular dependence of the reflection of polarized laser light (10) at a surface of a conversion material to control especially the color point of light emitted by means of the laser-based light source (100). The reflected laser light is within a first wavelength range and the converted light is in a second wavelength range different from the first wavelength range such that the color point of the light emitted by means of the laser-based light source (100) in a defined solid angle depends on the ratio between reflected and converted light. The invention further describes a corresponding method of light emission control, a vehicle headlight (200) comprising such a laser-based light source (100) and a lighting system comprising such vehicle headlights (200).

The invention describes a laser-based light source (100) which is adapted to use the angular dependence of the reflection of polarized laser light (10) at a surface of a conversion material to control especially the color point of light emitted by means of the laser-based light source (100). The reflected laser light is within a first wavelength range and the converted light is in a second wavelength range different from the first wavelength range such that the color point of the light emitted by means of the laser-based light source (100) in a defined solid angle depends on the ratio between reflected and converted light. The invention further describes a corresponding method of light emission control, a vehicle headlight (200) comprising such a laser-based light source (100) and a lighting system comprising such vehicle headlights (200).

A method for manufacturing a wavelength conversion member, includes: providing a wavelength conversion layer having a phosphor-containing portion and a light reflecting portion surrounding the phosphor-containing portion, and the wavelength conversion layer having an upper surface, a bottom surface and at least one side surface; forming a light-blocking film on the upper surface of the wavelength conversion layer; and removing a part of the light-blocking film by laser processing to expose at least a part of the phosphor-containing portion from the light-blocking film.

A method for manufacturing a wavelength conversion member, includes: providing a wavelength conversion layer having a phosphor-containing portion and a light reflecting portion surrounding the phosphor-containing portion, and the wavelength conversion layer having an upper surface, a bottom surface and at least one side surface; forming a light-blocking film on the upper surface of the wavelength conversion layer; and removing a part of the light-blocking film by laser processing to expose at least a part of the phosphor-containing portion from the light-blocking film.