LED lighting will be widely used in road lighting. This inference is based on the long life, high efficiency and high light utilization efficiency of LED. Many people have made many attempts to apply LEDs in road lighting, but it is not difficult to see that LED street lights have not been well developed in the past two or three years. The reasons are: high cost, short life, poor lighting performance (even Poor).
Fortunately, the upstream industry is developing rapidly. The improvement of LED chip light efficiency and price reduction make LED road lighting more and more close. The professional optical design also greatly improves the lighting effect. More manufacturers are making it. In this attempt, this paper proposes a new optical solution - a separate unit of reflectors - aimed at finding a new LED road lighting solution.
Compared with lenses, reflectors are characterized by low cost, high efficiency, and easy assembly.
The common lens material is PMMA. The current technology PMMA material has a transmittance of only 94%. After the lens is made into a lens, there is usually more extra light loss due to the effect of the refraction. The following examples illustrate:
Set a light source to produce 50,000 rays:
When there is no PMMA translucent plate, the efficiency is 100%, and now an ideal state PMMA transparent plate is set in front:
The efficiency has become 94.337%.
(Note: 16808 Rays appears in the figure because a light passing through the interface between PMMA and air may refract and reflect at the same time, thus increasing the amount of light, but a certain loss from the energy point of view.)
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