Abstract:
A light source unit according to an embodiment has a first light source which emits light in a first wavelength range, a second light source which emits light in a second wavelength range which differs from the light in the first wavelength range, a dichroic mirror to which the light in the first wavelength range and the light in the second wavelength range are incident from directions which differ from each other and which reflects or transmits the light in the first wavelength range and the light in the second wavelength range, and an optical device which is disposed on an optical path between the dichroic mirror and the second light source, and the optical device is a spectral member to which a coating is applied which transmits the light in the second wavelength range and reflects or absorbs the light in the first wavelength range.
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:
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 according to an embodiment has a first light source which emits light in a first wavelength range, a second light source which emits light in a second wavelength range which differs from the light in the first wavelength range, a dichroic mirror to which the light in the first wavelength range and the light in the second wavelength range are incident from directions which differ from each other and which reflects or transmits the light in the first wavelength range and the light in the second wavelength range, and an optical device which is disposed on an optical path between the dichroic mirror and the second light source, and the optical device is a spectral member to which a coating is applied which transmits the light in the second wavelength range and reflects or absorbs the light in the first wavelength range.