Choice of optics parts of LED Street lights

　　In the commercial lighting field, the current commonly used in optical software is divided into two categories: lighting design software and lamps with light design software. Lighting design software act as the role of existing lamps to develop a standardized solution with the best use of the characteristics of the light source is based on the desired optical effect and design the appropriate optics. With LED lamps for example, LED street lights with reflector and the lens is used to achieve the desired optical effect of optical devices.

　　LED and the existing lamp reflector. The angle of the existing LED lamps and LED angle is very similar, so if you choose not to use secondary optics. Enables the lowest cost, and minimal light loss system. LED use fewer components and fewer costs, can lighting system assembly simpler and less expensive. Disadvantage is that there will be more light shadow effect "If I is D and the light distribution of the light distribution between the target illumination can not use this method greatly on secondary optics should be used with secondary optics of the LED and the existing lamp reflector makers. LED secondary optics is in addition to the primary optical device, the additional optical elements for shaping the light output of the LED.

　　General secondary optics type reflector (light reflected back from a surface) or refraction (bending of light through refraction, refraction material, usually glass or plastic). Secondary optics can be purchased ready-made parts or standard illumination through ray tracing simulation model to design customization. Each LED with a secondary optics of the beam angle of each LED can be customized to achieve the desired accuracy of the output light image. Pour like, you can narrow beam angle of each LED spot lighting can be optimized, rather than to optimize the general illumination. Secondary optics using the following disadvantages: because of the increased complexity of components and assembly than, the high cost of lighting; since the optical devices are connected to each LED lighting that may still exist many shadows; secondary optics will reduce the effectiveness of the optical system .

　　Each LED is not using an optical device, the LED array can be used to spread a light diffuser. The advantage of this method is the beam angle than the bare LED wide beam angle can be achieved, and eliminating the shadow effect of multi-lighting 'illumination distribution of multi-source shadow effect and aesthetics of usually also determines the choice of the optical system.

　　Common form of LED street lights reflector optics and lenses, each with advantages and limitations should be selected according to need. Fetters than in the reflector, lens light loss should be large, but there is dispersion lens problem; However, in dealing with small angle (example: light special angle 20. Less) light distribution requirements, reflective glass will seem very awkward and lens is relatively easy.