Illumination apparatus, hologram device, and vehicle control method
AssigneeDai Nippon Printing Co., Ltd.
InventorsShumpei NISHIO, Makio KURASHIGE, Kaori NAKATSUGAWA, Tomoe SATO
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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.
Claims14
An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction comprising:
- a light source to emit a plurality of coherent light beams;
- and
- a diffraction optical device to diffract the coherent light beam incident from the light source 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,
- wherein the diffraction optical device comprises:
- a plurality of diffraction zones provided corresponding to the plurality of coherent light beams, respectively, the diffraction zones diffracting the corresponding coherent light beams to illuminate the illumination zone;
- and
- a synthesis optical system to combine the coherent light beams diffracted by the plurality of diffraction zones, respectively,
- wherein the illumination zone is illuminated with a coherent light beam combined by the synthesis optical system.
An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction comprising:
- 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,
- wherein the diffraction optical device comprises a plurality of diffraction zones, the plurality of diffraction zones illuminating partial zones that are arranged in the second direction in the illumination zone and different from one another, and
- wherein the light source and the diffraction optical device change an illumination form of the illumination zone, the illumination form including at least one of a width of the illumination zone in the second direction, a number to divide the illumination zone in the second direction, and an illumination length of the illumination zone in the first direction, by switching whether the coherent light beam is incident on the plurality of diffraction zones.
An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction comprising:
- a light source to emit a coherent light beam;
- a diffraction optical device to diffract the coherent light beam incident from the light source;
- and
- a detector to acquire environmental information on surroundings of the illumination apparatus,
- wherein the light source and the diffraction optical device change an illumination form of the illumination zone based on the environmental information acquired by the detector,
- the illumination zone is a zone to illuminate part of a road along a travel direction of a vehicle running on the road,
- the detector detects an obstacle in front in a running direction of the vehicle, and
- the light source and the diffraction optical device change an illumination form of the illumination zone when the detector detects the obstacle.
An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction comprising:
- a light source to emit a coherent light beam;
- a diffraction optical device to diffract the coherent light beam incident from the light source;
- and
- a detector to acquire environmental information on surroundings of the illumination apparatus,
- wherein the light source and the diffraction optical device change an illumination form of the illumination zone based on the environmental information acquired by the detector,
- the illumination zone is a zone to illuminate part of a road along a travel direction of a vehicle running on the road,
- the detector detects at least one of speed and acceleration of the vehicle, and
- the light source and the diffraction optical device change an illumination target of the illumination zone based on at least one of the speed and acceleration of the vehicle detected by the detector.
An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction comprising:
- a light source to emit a coherent light beam;
- a diffraction optical device to diffract the coherent light beam incident from the light source;
- and
- a detector to acquire environmental information on surroundings of the illumination apparatus,
- wherein the light source and the diffraction optical device change an illumination form of the illumination zone based on the environmental information acquired by the detector,
- the illumination zone is a zone to illuminate part of a road along a travel direction of a vehicle running on the road,
- the detector detects a slope in front in a running direction of the vehicle, and
- the light source and the diffraction optical device change an illumination form of the illumination zone in accordance with an inclination angle of the slope when the detector detects the slope.
Dependencies are inferred from the claim text.