As a new generation of light source, LED is gradually replacing the market of traditional energy-saving lamps.
However, the light-emitting form of the LED light source is quite different from the traditional light source. Currently, in addition to a few, such as street lamps, most of the LED products circulating on the market use the light distribution design of the traditional light source, which is relatively rough and general.
So, how to design the optical system of LED?
To this end, he specially interviewed the winner of the 2014 National Technology Invention Award and Professor Qian Keyuan from the Shenzhen Graduate School of Tsinghua University. Professor Qian Keyuan won the award on January 9, 2015 for his research contribution to the construction of "three-dimensional free optical surface construction for regulating light behavior and its application in semiconductor lighting ".
Simple and rude LED optical design
The most important factors affecting LED optical design include light, electricity and machinery. In the light, in addition to the light source itself, the design of the optical system is particularly important. Because the LED is a point source, to meet a variety of lighting needs, it must be matched with the corresponding optical system.
"From the LED lamp bead package, the primary light distribution is relatively simple. Packaging companies are generally based on cost and mass production, and more consideration of materials and structures can fully extract light and improve efficiency.
The other is to meet the requirements of our light color, including the control of color temperature and the uniformity of color temperature space. The true light distribution has to be designed by secondary optics. â€
However, in the process of designing optical systems, companies often adopt adoptivism, modify them slightly, or directly adopt supplier solutions.
The biggest problem facing the industry is the lack of professional talents, and the LED optical design requirements are higher. Enterprises generally lack theoretical guidance, and enterprises that can rationally and systematically design LED light distribution systems are rare.
LED precision light distribution design difficulties
Enterprise design capabilities and technology accumulation.
At the beginning of the industry, companies are busy seizing the market and promoting products. There are fewer things to consider in terms of light quality. For example, a street lamp can meet the basic illumination requirements, there will be no big problems, it will be better to achieve a certain uniformity of illumination, and there will not be too many people to be true. As for the general bulbs and tubes, there is basically no optical design.
Precision optical design itself is also the need to optimize the optimization of LED lighting products. The same street lamp should be designed well. It is necessary to carry out the corresponding optical design according to the different road sections and the configuration of the lamp itself. This requires the lamp factory to be able to The situation is to carry out professional optical design.
The width of the road, the height of the pole, the spacing of the street lamps, and the angle at which the street lamps are raised require the measures of the lens and optical system of the street lamp.
“It is not difficult to understand why some street lamps are used by some large enterprises. Enterprises need to configure different molds and match the corresponding optical systems according to different needs, so that each road can be made beautiful. Smaller scale. Enterprises, it is difficult to bear such costs.†Professor Qian Keyuan pointed out.
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