| 摘要 |
PURPOSE: A lens for an LED streetlight with an asymmetric radiation direction is provided to control a light distribution by forming a recess with a curvature shape on the lower side of the lens. CONSTITUTION: Two convex surfaces(110,120) are overlapped in a convex unit. A recess(130) is formed on the lower side of the convex surface to asymmetrically emit light from an LED device around a lens. A bottom surface(131) has a preset width except the recess. A fixing groove is formed in the streetlight structure. |
