摘要:
A headlamp (1) that utilizes a laser beam includes a scattered-light emitting unit (21) that emits scattered light upon receipt of a laser beam deviated from a predetermined path through which the laser beam is to pass or a predetermined irradiation region that is to be irradiated by the laser beam.
摘要:
Disclosed is a light emitting device including: a single or a plurality of laser diode(s) configured to emit a laser beam; a light emitting body configured to emit light upon irradiation with the laser beam(s); and an optical fiber guiding the single or plurality of laser beam(s) emitted from the single or plurality of laser diode(s) to a vicinity of the light emitting body and irradiating the guided single or plurality of laser beam(s) to a predetermined laser beam irradiation plane of the light emitting body, in a dispersed manner. This allows for achieving a high-luminance and a long life.
摘要:
A headlamp is provided, which has lower power consumption, a longer service life and a more compact size and yet is capable of easily projecting visible light and near infrared light in desired light distribution patterns. The headlamp includes a wavelength converting member and an excitation light source. The wavelength converting member includes a visible light fluorescent material which is excited by excitation light emitted from the excitation light source to emit visible light, and a near infrared fluorescent material which is excited by the excitation light emitted from the excitation light source to emit near infrared light. The visible light and the excitation light are mixed together to generate white light. The excitation light source is a semiconductor solid-state element.
摘要:
A headlamp 1 includes a laser diode 3 that emits a laser beam, a light emitting part 7 that emits light upon receiving the laser beam emitted from the laser diode 3, and a reflection mirror 8 that reflects the light emitted from the light emitting part 7. According to the headlamp 1, the light emitting part 7 has a luminance greater than 25 cd/mm2, and an area size of an aperture plane 8a perpendicular to a direction in which an incoherent light travels outward from the headlamp 1 is less than 2000 mm2.
摘要:
A light emitting device of the present invention includes: an LD chip for emitting excitation light; a light emitting body for emitting fluorescence upon irradiation with the excitation light from the LD chip; and a mirror including a light reflecting concave surface for reflecting the fluorescence from the light emitting body, the light reflecting concave surface of the mirror having a through-hole at a region other than a bottom region in the vicinity of the bottom of the light reflecting concave surface, and a truncated pyramid light converging section being inserted into the through-hole in order to guide the excitation light from the LD chip to the light emitting body.
摘要:
After a p-type cladding layer, an etching rate reducing layer and a p-type contact layer are formed in order on an n-type substrate, an etching mask is formed. Then, by using the etching mask, the p-type contact layer, the etching rate reducing layer and the p-type cladding layer are partially etched in the region outside the etching mask with an etchant. At this time, the etching rate of the layers by the etchant is slower in the etching rate reducing layer than in the p-type cladding layer and the p-type contact layer. Then, a metal thin film is formed such that the film continuously coats an upper surface and side surfaces of a ridge consisting of the above layers left after the etching step. A normal vector at a surface coated with the thin film has an upward component.
摘要:
A light-emitting device including a semiconductor laser element having at least a substrate, a first conductive type clad layer, an active layer, and a second conductive type clad layer in this order; and a phosphor absorbing a laser light emitted from the semiconductor laser element and radiating fluorescence, wherein the semiconductor laser element is a self-oscillation laser element.
摘要:
Provided are a semiconductor laser device capable of stable operation at the time of high power output without damage to a resonator end surface and a method of manufacturing the same, as well as an optical transmission module and an optical disk apparatus using the semiconductor laser device. A method of manufacturing a semiconductor laser device includes a laser wafer formation step of forming a laser wafer at least having a semiconductor layer to form a resonator end surface, a cleavage step of cleaving the laser wafer in the atmosphere and forming a semiconductor laser element having the resonator end surface, a contact step of brining the resonator end surface in contact with a nitrogen containing gas containing 90-100 volume % nitrogen for one hour or longer, and a reflectance control film formation step of forming a reflectance control film in contact with the resonator end surface.
摘要:
A liquid crystal display device of the present invention includes: a pair of substrates; a liquid crystal layer interposed between the pair of substrates; and a polymer wall formed on one of the pair of substrates. A thickness of the liquid crystal layer is defined by spacer beads to be greater than a height of the polymer wall.
摘要:
A light emitting device of the present invention includes: a laser diode group which generates a plurality of laser beams; a cylindrical light emitting element which emits incoherent light in response to the plurality of laser beams; and a light guide irradiation section which (i) guides the plurality of laser beams entered via a light incidence plane toward a light irradiation plane and (ii) irradiates the light irradiation area of the cylindrical light emitting element with the plurality of laser beams thus guided. The light irradiation plane of the light guide irradiation section has an area which is smaller than that of the light incidence plane.