Illumination device and projection display device
An illumination device comprises: a plurality of laser light sources arranged so as to be identical in a direction of light emission; an optical element for converting laser light emitted from the laser light sources into parallel light at least in one direction; and a fly-eye lens into which the laser light converted into parallel light is entered. Placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
1. An illumination device comprising:
a plurality of laser light sources arranged so as to be identical in a direction of light emission;
an optical element for converting laser light having predetermined divergent angles emitted from the laser light sources into parallel light at least in one direction by providing a convergence action to the emitted laser light; and
a fly-eye lens into which the laser light converted into parallel light is entered, wherein
placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
2. The illumination device according to claim 1 , wherein
the plurality of laser light sources are arranged in two or three dimensions.
3. The illumination device according to claim 1 , wherein
the optical element comprises at least one cylindrical lens or diffraction element.
4. A projection display device comprising:
an illumination device for applying light to a region to be illuminated; and
an imager disposed in the region to be illuminated, wherein the illumination device comprises:
a plurality of laser light sources arranged so as to be identical in a direction of light emission;
an optical element for converting laser light having predetermined divergent angles emitted from the laser light sources into parallel light at least in one direction by providing a convergence action to the emitted laser light; and
a fly-eye lens into which the laser light converted into parallel light is entered, and wherein
placement of the laser light sources is adjusted in such a manner that incident regions of the laser light on the fly-eye lens are mutually shifted in a row or column direction of lens cells disposed in the fly-eye lens.
5. The projection display device according to claim 4 , wherein
the plurality of laser light sources are arranged in two or three dimensions.
6. The projection display device according to claim 4 , wherein
the optical element comprises at least one cylindrical lens or diffraction element.