A headlight device includes: a light source that emits light; a light guide element that receives the light emitted from the light source through an incident surface and guides the received light to emit the guided light from an emitting surface; and a radiation optical system that radiates the light emitted from the emitting surface ahead of a vehicle. The light guide element includes: a first light guide portion that extends from the incident surface to the emitting surface and guides the received light; and a second light guide portion that is in contact with the first light guide portion, extends from the incident surface to the emitting surface, and guides the received light. The first and second light guide portions have different refractive indexes. The light guide element is configured so that part of light entering the first light guide portion can enter the second light guide portion.
Vehicle headlight device and light guide element
2018-04-24
Patent
Elektronische Ressource
Englisch
IPC: | F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / 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 / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS / F21Y Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend die Form oder die Art der Lichtquellen oder die Farbe des emittierten Lichts , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS |
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