Optical design of LED signal lamp

ED traffic light design method:

Design ideas

According to the design requirement of LED traffic light, the LED light source with high luminance, high brightness, low Angle of divergence and stable performance is carried out.

2, structure,

LED traffic light pillow type can be used as the optical lens group mask, considering the optical mask dustproof performance, smooth surface of pillow type lens array as its outer surface.

3, the material

On the selection of materials, LED traffic lights mainly considering the inner stress of material, refractive index, light transmittance, temperature tolerance, the processing difficulty, etc., can choose to use a high transmittance of PC material.

Design process

In order to make the light of the LED to be better, it needs to be optimized for the Fresnel lens. Using ZEMAX software, combined with the design of the uniform design of Fresnel lens. Respectively at the same time, in order to meet the horizontal and longitudinal direction of the light exit Angle, need to design the two direction of curved surface, respectively, using software construction pillow type of lens, the final optimization to meet the design requirements

Building a model

At the same time, it is necessary to verify the uniformity of the LED mask. In order to be able to effectively to verify the above two aspects at the same time, establish a hexagon is composed of seven leds as a traffic lights LED group unit (the middle one LED lamp, LED the rest of the distribution in the hexagonal vertex), to simulate the LED traffic lights glow of whole situation