PROBLEM TO BE SOLVED: To provide a lens unit for signal light devices that has easy configurations for reducing cost, can fix appropriate distribution of lights from a light source, and can surely limit the visible angles of distributed lights.SOLUTION: The lens unit 30A includes: a lens 30, which fixes distribution of an incoming light from an LED unit 20 from a signal light device 10; and a visual-angle limiting member 40 integrated with the lens 30 on a surface of the lens 30, which limits the visual angle of the distributed light, the visual-angle limiting member 40 having a plurality of light shielding bands with a small width on the front and back surfaces of a planar transparent substrate, and the light shielding bands on the front surface and the light shielding bands on the back surface corresponding to each other in the thickness direction.SELECTED DRAWING: Figure 4
【課題】簡易な構成によりコスト高を招くことなく、光源からの光の配光を適宜定めることができると共に、配光された光の視認角度を確実に制限することができる信号灯器用のレンズユニットを提供する。【解決手段】レンズユニット30Aは、信号灯器10のLEDユニット20から入射した光の配光を定めるレンズ30と、レンズ30の表面に一体に組み合わされて配光された光の視認角度を制限する視角制限体40とからなる。視角制限体40は、レンズ30の表面に沿う面状で透明な基体の表裏面に、互いに表裏で厚さ方向に合致する位置で細幅に延びる複数の遮光性帯を所定間隔おきに並設してなる。【選択図】図4
LENS UNIT SIGNAL LIGHT DEVICE
信号灯器用のレンズユニット
19.01.2017
Patent
Elektronische Ressource
Japanisch
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / 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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