• Follow us
Home > News > Content
LED Street Light Light Source Light Distribution
Aug 01, 2017

LED lights with light is to make the light as far as possible to be projected to the various areas of the road, LED Street Light in line with the requirements of road lighting light distribution, LED lights with light design is accurate in place whether it can replace the traditional one of the key factors.

In the road lighting, if there is no LED light source light, LED Street Light the light on the road surface for the larger circular spot, there will be part of the light scattered outside the road without being used

In order to meet the road surface brightness, illumination, LED Street Light uniformity requirements, LED Street Light and as much as possible so that most of the light are distributed in the road surface to improve the utilization of light to reduce unnecessary waste, usually need to LED light distribution, LED The light of the street light is illuminated. The light or light spot formed on the road surface is preferably rectangular

The spatial distribution of luminous intensity is often referred to as light distribution curve. Under the street light, the light intensity should be the smallest, with the elevation angle θ increased, LED Street Light the intensity I increased.

Due to the complexity of the optical design, the shape of the light distribution is difficult to fully meet the function of the relationship, you can reduce the θ angle projection range, LED Street Light reduce the distance between the lamps to get uniform illumination.

LED street light distribution program in the road lighting requirements on the basis of the same time to consider the control glare and consider the environmental coefficient. For road lighting, the luminous efficiency and light distribution curve is two important parameters, the current LED lights with light the main program has the following basic form.

In the power LED manufacturing process, LED Street Light the use of lens technology package can improve light efficiency, reduce light output loss, change the light output characteristics, LED package lens technology and high-power LED street lighting a light distribution has a certain relationship. LED Street Light Through a good package lens design, LED can get better light output characteristics.

The use of double-headed lens package LED light distribution, LED Street Light can be a single LED light intensity output curve into a "bat wing" shape, in order to further achieve the overall light intensity of the overall output curve of the "bat wing" shaped light.

LED lights in the high-power LED using a lens or reflector to further change the output light characteristics, that is, the secondary light distribution LED lights.

LED lights of the secondary light distribution mainly in the following circumstances.

The use of all-reflective lens LED secondary light distribution. LED Street Light The light is directed from the relative optical density to the relative optical sparse medium, and the total reflection can occur when the incident angle is greater than the critical angle. Using this principle, LED Street Light the axisymmetric total reflection lens is designed.

For example, the beam angle is changed to within ± 30 °, which facilitates further light distribution design. The total reflection lens is shown in Fig.

The use of free-form lens LED secondary light distribution. LED Street Light In this design, the free surface optical element with asymmetric rectangular light distribution in the XY axis direction is used.

For example, LED Street Light a uniform distribution of light distribution of ± 60 ° is generated on the X-axis to meet the lighting requirements in the longitudinal direction of the road. LED Street Light A uniform distribution of light distribution of ± 30 ° is produced on the Y-axis to obtain an LED "Batwing "Shaped with light.

In the free surface design, the distribution of the light source and the illumination surface of the illumination target is obtained by including the differential equation method, LED Street Light the multi-parameter optimization method, the multi-surface simultaneous design method and the shear method.

The use of external lens and reflector LED secondary light distribution. LED Street Light Choose the appropriate lens and parabolic reflector, LED Street Light so that the light to meet certain requirements.

LED lights three times the light distribution is in the high-power LED on the basis of the completion of the second light, through a number of LED (unit module) superposition and space arrangement to meet the road lighting average brightness, average illumination and uniformity The request.