LED TRAFFIC SIGNAL DEVICE

摘要

The present invention provides a LED (Light Emitting Diodes) traffic signal device including a plurality of LEDs, a light-distribution lens and a Fresnel lens arranged between the plurality of LEDs and the light-distribution lens. The Fresnel lens is formed with multiple sections coaxially arranged with respect to an optical axis, every section having a different radius of curvature corresponding to a different focal distance.