| 主权项 |
1. An illumination unit comprising:
one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device configured to emit light from a light emission region thereof, the light emission region including one or more dot-shaped or non-dot-shaped light-emitting spots; and an optical member configured to allow light incident from the solid-state light-emitting device to pass therethrough and exit therefrom, wherein,
the solid-state light-emitting device includes a single chip or a plurality of chips, the single chip configured to emit light in a single wavelength range or light in a plurality of wavelength ranges, the plurality of chips configured to emit light in a same wavelength range or light in wavelength ranges different from one another,at least one of the chips in the one or more light sources is configured of a laser diode,the optical member includes an integrator including a first fly-eye lens and a second fly-eye lens, and configured to uniformize a luminance distribution of light in a predetermined illumination region illuminated with light incident from the solid-state light-emitting device, the first fly-eye lens on which light from the solid-state light-emitting device is incident, the second fly-eye lens on which light from the first fly-eye lens is incident,each of the first and second fly-eye lenses includes a plurality of cells, the cells in the first fly-eye lens being arranged along a first direction and a second direction orthogonal to each other as the arrangement directions,a far field pattern (FFP) of laser light emitted from the light-emitting spot of the chip configured of the laser diode has an anisotropic shape, anda luminance distribution shape of light incident on an incident plane of the first fly-eye lens also has an anisotropic shape caused by the anisotropic shape of the FFP, and a major-axis direction of the luminance distribution shape is different from arrangement directions of the cells in the first fly-eye lens, the major-axis direction of the incident light being different from both the first and second arrangement directions of the cells of the first fly-eye lens. |
