Abstract: A predetermined lighting pattern is projected on a surface to be illuminated and the lighting pattern is displaced on the surface to be illuminated. A laser beam generated by a laser light source is broadened by a magnifying lens so as to generate a divergent light. The divergent light is shaped by the collimation lens into a parallel illumination light, and the parallel illumination light is caused to be incident on an incident plane of a diffraction optical element which records a hologram image. A diffracted light from the diffraction optical element forms the lighting pattern as a hologram reconstructed image on the surface to be illuminated. By translating the collimation lens by a collimation-lens drive unit along a movement plane that is orthogonal to an optical axis of the laser beam, the lighting pattern can be displaced on the surface to be illuminated.

Abstract: An illumination device (10) includes: laser light sources (20) having different radiant fluxes; and diffractive optical elements (40) provided correspondingly to the respective laser light sources. A planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a minimum radiant flux, is smaller than a planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a maximum radiant flux.

Abstract: An illumination device includes an optical element including a hologram recording medium capable of diffusing a coherent light beam, the hologram recording medium comprising a plurality of regions, each region diffusing a coherent light beam to an illuminated region corresponding to that region, and an irradiation device configured to irradiate the optical element with the coherent light beam so as to allow the coherent light beam to scan the hologram recording medium. The coherent light beam incident to a position existing in each region of the hologram recording medium is diffused to an entire region of the illuminated region corresponding to the region in order to illuminate the entire region of the illuminated region.

Abstract: An illumination device including a light source; a light scanner for 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: Provided is an illumination device which has a coherent light source that emits a first coherent light beam and a second coherent light beam, an optical device that diffuses the first coherent light beam to illuminate a first illumination zone and diffuses a wave of the second coherent light beam to illuminate a second illumination zone, and a timing control unit that individually controls incidence timing of the first coherent light beam and the second coherent light beam on the optical device or illumination timing of the first illumination zone and the second illumination zone, wherein the optical device includes a first diffusion region on which the first coherent light beam is incident, and a second diffusion region on which the second coherent light beam is incident, the first diffusion region is capable of illuminating the first illumination zone by diffusion of the incident first coherent light beam.

Abstract: An illumination device including a light source; a light scanner for 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: 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.

Abstract: A screen includes a sheet member including a control layer that includes a plurality of particles or a predetermined liquid, and an electrode that applies a voltage to the control layer to drive the plurality of particles or the predetermined liquid. The plurality of particles or the predetermined liquid allows light emitted from a coherent light source disposed at a predetermined site to be transmitted or reflected, and the electrode causes at least one of movement and rotation of the plurality of particles to occur at the inside of the control layer in correspondence with the voltage, or causes the predetermined liquid to move at the inside of the control layer in correspondence with the voltage.

Abstract: An optical sheet 50 includes: a particle layer 55 that has a first side and a second side facing each other, the particle layer 55 including a holding section 56 that includes a cavity 56a and a particle 60 that is contained in the cavity 56a and includes a first polymer section 61 and a second polymer section 62; a first base material 51 provided on the first side of the particle layer 55; a second base material 52 provided on a second side of the particle layer 55; and diffusing sections 53 and 58 provided on the second side of the particle layer 55.

Abstract: An illumination device has an optical device and an irradiation unit. The irradiation unit has a light source emitting a coherent light beam, and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source. The light source has light sources emitting a plurality of coherent light beams having an identical wavelength range, the hologram recording medium has a recording area to be scanned with each of a plurality of coherent light beams reflected by the scanning device, and the recording area has an interference fringe that diffracts an incident coherent light beam. The optical device uses the plurality of coherent light beams diffracted by the interference fringe of the recording area so that each of the coherent light beams diffracted by the hologram recording medium is superimposed on at least one portion to reproduce the image of the reference member.

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.

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 an illumination device which has a coherent light source that emits a first coherent light beam and a second coherent light beam, an optical device that diffuses the first coherent light beam to illuminate a first illumination zone and diffuses a wave of the second coherent light beam to illuminate a second illumination zone, and a timing control unit that individually controls incidence timing of the first coherent light beam and the second coherent light beam on the optical device or illumination timing of the first illumination zone and the second illumination zone, wherein the optical device includes a first diffusion region on which the first coherent light beam is incident, and a second diffusion region on which the second coherent light beam is incident, the first diffusion region is capable of illuminating the first illumination zone by diffusion of the incident first coherent light beam.

Abstract: Provided are a projection device and a projection-type video display device capable of displaying a plurality of videos, allowing speckles to be inconspicuous, and miniaturizing an optical system. A projection device includes an optical element including light diffusion elements capable of diffusing light, an irradiation device configured to irradiate the optical element with illumination light beams, each illumination light beam scanning the corresponding light diffusion element, spatial light modulators, each spatial light modulator being illuminated with illumination light beam which is incident from the irradiation device to each light diffusion element to be diffused, and projection optical systems, each projection optical system projecting modulation image obtained on each spatial light modulator on corresponding screen. The illumination light beam, which is incident to each position of each light diffusion element to be diffused, overlappedly illuminates on corresponding spatial light modulator.

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: An optical device including a hologram recording medium that can reproduce an image of a reference member and an irradiation unit that emits a coherent light beam to the optical device. The irradiation unit includes a light source for emitting a coherent light beam and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source and that makes a reflected coherent light beam scan the hologram recording medium. The light source has light sources for emitting coherent light beams having different wavelength ranges. The hologram recording medium has a plurality of recording areas to be scanned with a plurality of coherent light beams reflected by the scanning device, respectively. Each of the plurality of recording areas has an interference fringe that diffracts a coherent light beam of the corresponding wavelength range.

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 includes an irradiation device, a diffusing element, a first lens array, a second lens array and a deflecting element, which are arranged in this order along the light path. Diffused light that has entered a particular region on the diffusing element and has been diffused by the diffusing element, and diffused light that has entered a region, which differs from the particular region, on the diffusing element and has been diffused by the diffusing element, travel to regions which at least partly overlap each other. The diffusion angle of diffused light exiting the diffusing element is not more than the acceptable angle formed between two line segments LS extending from the principal point of a second unit lens of the second lens array to both ends of a first unit lens of the first lens array.

Abstract: Provided is an illumination device which has a coherent light source that emits a first coherent light beam and a second coherent light beam, an optical device that diffuses the first coherent light beam to illuminate a first illumination zone and diffuses a wave of the second coherent light beam to illuminate a second illumination zone, and a timing control unit that individually controls incidence timing of the first coherent light beam and the second coherent light beam on the optical device or illumination timing of the first illumination zone and the second illumination zone, wherein the optical device includes a first diffusion region on which the first coherent light beam is incident, and a second diffusion region on which the second coherent light beam is incident, the first diffusion region is capable of illuminating the first illumination zone by diffusion of the incident first coherent light beam.