PROBLEM TO BE SOLVED: To provide ultra-fine rod-like transparent material enabling a generated dark line to be disappeared for attaining a direct lighting by making at least a part of longitudinal section of the transparent material into an arcuate shape or narrowing a spacing of a plurality of pattern grooves (recesses) formed at a reflection surface of the transparent material in order to extend an irradiation distance of light outgoing from a light-emitting face of the transparent material.SOLUTION: This invention relates to transparent material 3 for guiding light 12 incident from a longitudinal end incident face. One of the side surfaces of the transparent material 3 is formed with a planar reflection surface 3b and the other side surface opposing against a reflection surface 3b is formed with a light-emitting surface 3a of arcuate section. A plurality of recesses 3e are arranged and spaced apart along a longitudinal direction at a central region spaced apart from the side end part in a width direction of the reflection surface 3b, and at the same time, forming positions in width direction of the adjoining recesses 3e are set to be staggered.

    【課題】直接照明を目的として、導光体の発光面から出射する光の照射距離を伸ばすために、導光体の長手方向断面の少なくとも一部を円弧状としたり、あるいは、導光体の反射面に形成した複数のパターン溝(凹部)の間隔を狭めたりすることによって発生する暗線を消失させることを可能とした、極細棒状の導光体を提供する。【解決手段】長手方向の端面である入射面から入射した光12を導光する導光体3であって、導光体3の側面のうちの一つには、平面状の反射面3bが形成され、反射面3bに対向する他の側面には少なくともその一部に断面円弧状の発光面3aが形成されていて、反射面3bの幅方向において側端部から離間した中央領域に、複数の凹部3eが、前記長手方向に沿って間隔を空けて設けられているとともに、隣接する凹部3eの前記幅方向の形成位置が互い違いの配列となるように設定されている。【選択図】図5


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    Title :

    TRANSPARENT MATERIAL


    Additional title:

    導光体


    Contributors:
    KOJIMA KANEHARU (author) / SATO AKIHIKO (author) / KOYAMA JUN (author)

    Publication date :

    2015-12-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / 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




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