A phosphor based light source, including: an incident beam of light focused onto the front surface of a piece of phosphor; wherein the phosphor has polished back surface coated with a high-reflection, high-thermal-conduction layer, sandwiched between the phosphor and a heat sink, and the phosphor emission light is collected into a fiber or fiber bundle by a single lens or lens groups.

A phosphor based light source, including: an incident beam of light focused onto the front surface of a piece of phosphor; wherein the phosphor has polished back surface coated with a high-reflection, high-thermal-conduction layer, sandwiched between the phosphor and a heat sink, and the phosphor emission light is collected into a fiber or fiber bundle by a single lens or lens groups.

A lighting device disclosed in the embodiment of the invention includes a base member including a straight portion and a curved portion, a substrate including a first substrate disposed on the straight portion of the base member and a second substrate disposed on the curved portion; a plurality of light sources disposed on each of the first and second substrates, a resin layer including a first resin portion disposed on the first substrate and a second resin portion surrounding the second substrate, and a phosphor layer disposed on the resin layer, and an outer side surface of the second resin portion may include a curved surface.

A lighting device disclosed in the embodiment of the invention includes a base member including a straight portion and a curved portion, a substrate including a first substrate disposed on the straight portion of the base member and a second substrate disposed on the curved portion; a plurality of light sources disposed on each of the first and second substrates, a resin layer including a first resin portion disposed on the first substrate and a second resin portion surrounding the second substrate, and a phosphor layer disposed on the resin layer, and an outer side surface of the second resin portion may include a curved surface.

A light emitting device of the present invention includes a light-emitting section for generating fluorescence by receiving a laser beam, and a light irradiation unit for irradiating a light irradiated surface of the light emitting section with a laser beam that increases regularly in beam diameter in a direction in which the laser beam travels.

A lighting device is provided which includes: a wavelength converter that emits, from laser light, light having a wavelength different from a wavelength of the laser light; and a reflector surrounding the wavelength converter and including a surface of revolution that reflects the light emitted from the wavelength converter. The reflector includes, in the surface of revolution, a through-hole through which the laser light passes.

A light emission device includes a plurality of light sources, a light deflector that deflects excitation light beams emitted by the plurality of light sources, and a wavelength converter that receives and converts the excitation light beams deflected by the light deflector to wavelength-converted light of a different wavelength, and emits the wavelength-converted light. The light deflector includes one movable mirror on which the excitation light beams are incident along different optical axes. The excitation light beams have equally long optical path lengths from the one movable mirror to the wavelength converter.

A light emission device includes a plurality of light sources, a light deflector that deflects excitation light beams emitted by the plurality of light sources, and a wavelength converter that receives and converts the excitation light beams deflected by the light deflector to wavelength-converted light of a different wavelength, and emits the wavelength-converted light. The light deflector includes one movable mirror on which the excitation light beams are incident along different optical axes. The excitation light beams have equally long optical path lengths from the one movable mirror to the wavelength converter.

A luminaire including a wavelength converter and a method of manufacturing the luminaire are provided. The wavelength converter radiates, based on a laser light beam, a light beam having a wavelength different from the laser light beam. The method of measuring the luminaire includes measuring wavelengths of laser light beams oscillated by a plurality of laser elements to identify main wavelengths of the plurality of laser elements, storing association information between main wavelength information items indicating the main wavelengths identified and element information items identifying the plurality of laser elements corresponding to the main wavelengths identified, selecting a combination of laser elements having a composite wavelength falling within a predetermined range, from the plurality of laser elements, based on the association information, and arranging optical paths to irradiate a same area of the wavelength converter with the laser light beams of the combination of laser elements selected.

A light source device includes: a light source element emitting first light; a first selective reflection element disposed at a position where the first light is incident, the first selective reflection element transmitting a component of first linear polarized light and reflecting a component of second linear polarized light; a second selective reflection element disposed at a position for receiving incident light that has passed through or been reflected by the first selective reflection element, the second selective reflection element transmitting or reflecting the incident light in accordance with a wavelength region; and a first polarization direction conversion element disposed between the first and second selective reflection element, the first polarization direction conversion element converting the first linear polarized light into elliptical polarized light. The first polarization direction conversion element converts the elliptical polarized light reflected by the second selective reflection element into the second linear polarized light.