Neaheids

In the very beginning, we use the flashlight (not the LED flashlight) in the night. And then, the streets light appear. Let look at the traditional street lighting.

We know now, for street lighting source types are: metal halide lamps, incandescent and high pressure sodium lamp and so on. Including high pressure sodium light because of its high efficiency, long life, strong penetration, etc. It has been widely adopted. The basic optical structure of the light source, reflector and lamp composed of transparent. As the source of light radiation is almost occupy the entire space of this feature. Require the use of optical systems for street light design with street lighting to achieve the national standard photometric parameters. Usually high-pressure mercury lamp type is the use of parabolic reflector for light distribution groove. It can adjust the lighting in the desired area. The use of LED light source as a new street lighting, we need to find a new model for the LED light source with light. The brightness of street lighting achieves the target.

LED lamp optical system: LED lights for the optical structure can be divided into two types: projective and reflective. Projected street usually by rotating the optical structure of the parabolic reflector and lenses, but the single has not yet reached such a structure with street lighting. Light requirements must be carried out again with a light lens. As shown in Figure 1, which ways of the reflector with light microscopy and co-ordination between the demanding? To the design, installation and maintenance is more difficult. The reflective optical structure

Because only the light distribution on the reflector designs, it is more and more used by the designers. This structure is the use of reflective optics, and reflector design for a hybrid structure.

Illumination optical computer-aided design: Lighting design is non-imaging optics optical design. The main energy transfer from the perspective of the law to study the optical system, the basic use of non-sequential ray tracing, illumination commonly used method of calculation is the use of Monte Carlo methods. In this paper, we use the TRACEPM optical simulation software simulation. Design of the basic steps is as follows:

First, determine the number of LED light source, the establishment of the light source model and set its parameters.

Second, the establishment of hybrid reflector structure of the three-dimensional model.

Third, to determine the arrangement of the LED light source and optical simulation software;

Fourth, the simulation results were analyzed and compared simulation results with the requirements of street lighting with light differences;

Fifth, differences based on the simulation results meet the requirements or part of the corresponding parameters of the revised repeatedly until meet the design requirements