Patent ID: 8624799
Filing Date: 2014-01-07
Classification: G02B,G03B,H04N

Abstract:
1. An illumination unit, comprising: one or more light sources each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots; an optical member allowing the light incident from the solid-state light-emitting device to pass therethrough and exit therefrom; and an optical device, the solid-state light-emitting device including a single chip or a plurality of chips each emitting the light, wherein one or more of the chips in the one or more light sources as a whole is a laser diode, the optical member includes an integrator having a first fly-eye lens on which the light from the solid-state light-emitting device is incident and a second fly-eye lens on which the light from the first fly-eye lens is incident, the integrator uniformalizing an illuminance distribution of light in a predetermined illumination region illuminated by the light incident from the solid-state light-emitting device, and the optical device is disposed on an optical path between the first fly-eye lens and the one or more light sources including the one or more chips configured by the laser diode, and allows a shape of a luminance distribution of incidence light on an incidence plane of the first fly-eye lens to be expanded along a minor axis direction of the shape of the luminance distribution.