Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.

Abstract: Provided is a lighting device capable of safely illuminating a region to be illuminated having a first direction while making its edge sharp. A lighting device illuminates a region to be illuminated extending in a first direction and extending in a second direction intersecting with the first direction. The lighting device includes a light source and a diffractive optical element having a first hologram component and a second hologram component both of which diffract light from the light source and direct the light to the region to be illuminated, wherein the diffracted light from the first hologram component illuminates the entire region of the region to be illuminated and the diffracted light from the second hologram component illuminates the entire region of the region to be illuminated.

Abstract: A lighting device capable of illuminating an entire region of a region to be illuminated with uniform brightness and with a desired color is provided. Provided is a lighting device that extends in a first direction and illuminates a region to be illuminated that extends in a second direction intersecting with the first direction includes a light source that emits coherent light, and a plurality of hologram components each of which diffracts the coherent light emitted by the light source to illuminate the entire region of the region to be illuminated. At least one of the plurality of hologram components diffracts the incident coherent light so that illuminance at both end portions in the second direction of the region to be illuminated is higher than the illuminance at the central portion.

Abstract: The invention provides a structurally simple illumination device capable of safely illuminating the desired area with coherent light. An illumination device (1) includes a laser light source (11) (coherent light source), a light diffuser (14), and a light scanning device (21). The laser light source (11) emits laser beam L (coherent light). The light diffuser (14) diffuses the laser beam L emitted from the laser light source (11). The light scanning device (21) guides the laser beam L to one of the illumination subareas constituting part of an illumination area, thereby scanning the laser beam L radiated from the light diffuser (14) across the illumination area.

Abstract: An illumination device including a light source; a light scanner or changing a light path of light-source light; a light diffusion device having element diffusion devices; and a light-path adjustment device disposed on a light path of the light-source light, the light-path adjustment device having element adjustment devices corresponding to respective element diffusion devices, adjusting a light path of the light-source light. An incident position of the light-source light on the light-path adjustment device varies depending on a light path determined by the light scanner. An incident angle of the light-source light on each element diffusion device varies depending on an incident position on the element adjustment device corresponding to the element diffusion device. An emergent angle from each element diffusion device varies depending on the incident angle on the element diffusion device. Each element diffusion device illuminates an element illumination area corresponding to the element diffusion device.

Abstract: The illumination device capable of illuminating plural regions via a light diffusion element includes a laser light source that emits a laser beam, an optical scan unit capable of changing an optical path of the laser beam from the laser light source, an optical path adjustment element and a light diffusion element. On the optical path adjustment element, the laser beam from the optical scan unit is incident, an incidence position of the laser beam varies depending on the optical path determined by the optical scan unit; and an emission angle of the laser beam varies depending on the incidence position. The light diffusion element diffuses the laser beam and emits diffused light. On the light diffusion element, the laser beam from the optical path adjustment element is incident and an emission angle of the diffused light varies depending on an incidence angle of the laser beam.

Abstract: An illumination device has a coherent light source, an optical device that diffuses the plurality of coherent light beams and illuminates a predetermined illumination area, and a timing control unit that individually controls incident timing of the plurality of coherent light beams to the optical device or illumination timing of the illumination area, wherein the optical device has a plurality of diffusion regions, the diffusion regions being provided corresponding to the plurality of coherent light beams, the plurality of diffusion regions illuminate the illumination range by diffusion of incident coherent light beams, the plurality of diffusion regions have a plurality of element diffusion regions, the plurality of element diffusion regions illuminate partial regions in the illumination area by diffusion of incident coherent light beams, and at least parts of the partial regions illuminated by the plurality of element diffusion regions are different from one another.