Abstract:
The present invention provides a microlens array including multiple microlenses arranged axially parallel to one another, wherein entrance surfaces of the microlenses on which light is incident are made of resin, and exit surfaces of the microlenses from which light exits are made of glass.
Abstract:
A light source unit includes an excitation light source, a plurality of light sources at least one of which emits a light ray in a wavelength band different from that of the excitation light source, a plurality of collimator lenses which make light rays from the light sources into parallel ones, a luminous light emitting device which receives the light ray from the excitation light source to emit a luminous light ray, a microlens array which diffuses the light rays from the light sources to a predetermined range and distributes the luminance thereof uniformly within the predetermined range and a collective lens which collects the light rays from the light sources which are emitted from the microlens array, and the light sources are disposed so that the light rays from the plurality of light sources intersect the light ray from the excitation light source at right angles.
Abstract:
A light source apparatus includes an excitation light emitter configured to irradiate excitation light, a phosphor that receives the excitation light and converts the excitation light into wavelength band light different from the excitation light, and a color wheel device. A first region of regions divided in a radial direction of the color wheel device includes a first transparent part that transmits the wavelength band light. A second region, which is different from the first region of the regions divided in the radial direction of the color wheel device, includes a reflector that reflects the excitation light and changes a light path and a second transparent part that transmits the excitation light. The phosphor is arranged on a light path of the excitation light reflected by the reflector or on a light path of the excitation light transmitted by the second transparent part.
Abstract:
A light source device includes first to third light sources, a fluorescent material, and a dichroic mirror. The dichroic mirror is constituted so that excitation light emitted from the first light source is transmitted through the dichroic mirror and applied to the fluorescent material, light of a first wavelength bandwidth emitted from the second light source is transmitted through the dichroic mirror and emitted in a predetermined emitting direction, generated light emitted from the fluorescent material is reflected by the dichroic mirror and emitted in the predetermined emitting direction, and at least a part of light of a second wavelength bandwidth from the third light source passes the outside of the dichroic mirror without entering the dichroic mirror, and is emitted in the predetermined emitting direction.