To provide an illumination device for movable body which is suitable for reducing an accident of a movable body and an automobile by forming a predetermined orientation pattern on a road surface.SOLUTION: An illumination device 1 for movable body according to Embodiment 1 includes: a light source 110 for emitting coherent light used for formation of a light distribution pattern 1a; a shaping optical system 111 for shaping the coherent light emitted by the light source 110 to parallel light; a projection angle variable optical system 11 which has at least one diffraction optical element 112 for projecting diffracted light obtained by diffracting the parallel light shaped by the shaping optical system 111 to form the predetermined light distribution pattern 1a on a road surface and configures to change a projection angle in a vertical direction related to the diffracted light projected by the diffraction optical element 112; and a controller 10 for controlling the projection angle according to a vehicle speed signal output by a vehicle speed sensor for measuring the vehicle speed of the movable body.SELECTED DRAWING: Figure 1
【課題】所定の配向パターンを路面上に形成して移動体と自動車の事故を減らすことに適した移動体用照明装置を提供する。【解決手段】実施形態1に係る移動体用照明装置1は,配光パターン1aの形成に用いるコヒーレント光を照射する光源110,光源110が照射したコヒーレント光を平行光に整形する整形光学系111,および,整形光学系111が整形した平行光を回折させた回折光を投射して所定の配光パターン1aを路面上に形成する少なくとも一つの回折光学素子112を有し,回折光学素子112が投射する回析光に係る鉛直方向の投射角を変更可能に構成した投射角可変光学系11と,移動体の車速を計測する車速センサが出力する車速信号に応じて,投射角を制御するコントローラ10を備えている。【選択図】図1
ILLUMINATION DEVICE FOR MOVABLE BODY
移動体用照明装置
2021-01-14
Patent
Electronic Resource
Japanese
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen |
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