New progress in the application of ultraviolet LED free-form surface light distribution technology by Chongqing Research Institute

Recently, with the support of the Chongqing Science and Technology Plan Project, the Integrated Optoelectronic Technology Research Center of the Chongqing Institute of Green and Intelligent Technology of the Chinese Academy of Sciences has made important progress in the application research of UV LED free-form surface light distribution technology, and successfully used the UV led light source for the field of exposure machines. The products have been applied in PCB, LCD panel, touch screen and other industries. Related results have been granted national patent authorization (patent number: lens 201320875490.0 for UV LED collimation, high uniformity UV LED exposure head 201420651432.4).

The conventional parallel light exposure machine uses a high-pressure mercury lamp as a light source, and its life is only 1000 hours, which consumes high power and is polluted. The use of UVLED to replace the mercury lamp light source, the lifespan can reach 50 times of the mercury lamp, the power consumption can be reduced by 90%, the production cost of the enterprise is greatly reduced, and the environment is environmentally friendly.

At present, Chongqing Research Institute has broken through the key technologies of LED multi-free-form surface precise light distribution and inorganic optical component processing in the ultraviolet band. For the first time, a parallel light exposure head based on ultraviolet LED has been developed, and the parallel half angle can be controlled within ±2°. The illumination unevenness is less than 3%, and the illumination intensity is as high as 40 mW/cm2.

Partially developed UVLED exposure head and light source module

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