A coherent light beam (L110) from a light source (110) is scanned by a scanning member (120) and is incident to a light receiving surface of a light diffusing element (130). The incident light beam (L120) is emitted as diffused light (L130), passes through an illumination optical system (140), and forms a drawing spot (D) on an illumination target surface (S). When a scan control unit (150) controls scanning of the light beam (L120) according to an arrow-shaped pattern, an illumination area (LA) having an arrow shape is formed by the moving drawing spot (D) on the illumination target surface (S). Since the light diffusing element (130) performs anisotropic diffusion that spreads the incident light beam mainly in the X-axis direction, the spread of the diffused light (L130) is biased in one direction. Thus, it is possible to form the clear illumination area (LA) with suppressed blurring on the illumination target surface (S) while securing safety for the coherent light.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    照明装置


    Erscheinungsdatum :

    2022-06-28


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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 / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen