The present invention, to achieve this purpose, is equipped with an infra-red emitting unit; an infra-red receiving unit that is installed inside a lens and receives infra-red reflected from the infra-red emitting unit; a CDS sensor installed inside a lens and which measures visible light to compensate the emitting output of the infra-red emitting unit, and; a heater that is installed in the lens and which is supplied power to generate heat, and is characterized in that the lens has a gentle curvature, with ceramic-coated coil securing grooves formed on the inside of the lens along its inside surface, with heater coils installed by inserting in the coil securing grooves.
SNOW REMOVING APPARATUS OF LED TRAFFIC SIGNAL LIGHT
2019-05-16
Patent
Electronic Resource
English