To provide a light projection lens that can bring a light emitted from a light source into homogeneous intensity on an irradiation surface which is irradiated with the light, and also make a spot shape long.SOLUTION: A light projection lens 130 includes a first recessed part 133 recessed in a direction that a light emitted from a light source is incident, an inner surface 131 on which the light emitted from the light source is incident, and an outer surface 132 from which the light incident on the inner surface 131 is emitted. The outer surface 132 and the inner surface 131 in the first recessed part 133 are different in curvature radius at least partially on a cross section parallel to an optical axis of the light emitted from the light source. In the first recessed part 133, the shape of a cross section perpendicular to an optical axis direction of the light emitted from the light source is elliptical. In the light emitted from the outer surface 132, light volume in a direction different from the optical axis direction is larger than the light volume in the optical axis direction of the light emitted from the light source.SELECTED DRAWING: Figure 7

    【課題】光源から出射された光が照射される照射面において、当該光を均質な光強度にし、且つ、スポット形状を長尺にできる投光用レンズ等を提供する。【解決手段】投光用レンズ130は、光源から出射された光が入射される方向に凹んだ第1凹部133を有し、且つ、光源から出射された光が入射される内表面131と、内表面131に入射された光が出射される外表面132と、を備える。外表面132と第1凹部133における内表面131とは、光源から出射された光の光軸に平行な断面において、曲率半径が少なくとも一部で異なる。第1凹部133は、光源から出射された光の光軸方向に垂直な断面の形状が長円形状である。外表面132から出射された光は、光源から出射された光の光軸方向における光量よりも当該光軸方向とは異なる方向における光量が多い。【選択図】図7


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    Title :

    LIGHT PROJECTION LENS AND MOVABLE BODY


    Additional title:

    投光用レンズ及び移動体


    Contributors:

    Publication date :

    2020-08-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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



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