| 摘要 |
A lens for an LED is provided to facilitate a process for forming a lens and reduce a defective proportion in forming a lens by forming a straight surface and a curved surface that are formed in a vertical or a horizontal axial direction with respect to the central axis of the edge of the lens. Total reflection surfaces reflect the light irradiated from a light emitting device, extended upward from the central axis of a body to the outside and having different slopes. A refraction surface refracts the light reflected from the total reflection surface, extended to the outer direction of the total reflection surface and including at least one straight surface and a curved surface. The straight surface is extended from the periphery of the total reflection surface. The curved surface is extended downward from the periphery of the straight surface to the outside with respect to the central axis. The total reflection surface has first and second total reflection surfaces(121a,121b). The first total reflection surface has a section of a V-typed groove having a predetermined slope. The second total reflection surface is tilted to have a greater slope than that of the first total reflection surface with respect to the central axis, extended upward from the periphery of the first total reflection surface.
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