As the fourth-generation lighting source, LED is the key to achieving efficient light output and collimated lighting. Researchers such as Wang Guangzhen and Wang Lili of the Information Photonics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences have been conducting research on LED uniform illumination and collimated illumination since 2011, and have made important progress in a short time. So far, 4 academic papers have been published in Applied optics (2 articles), Journal of the Optical Society of America A (1 article), and "Journal of Optics".

After the paper on LED uniform illumination lens designed by researchers last year was reported as a cover paper by the American Optics Society Applied Optics Volume 50, Issue 21, the newly-designed results of the lens design for achieving efficient collimated LED lighting collimating lens for light- Emitting-diode light source based on non-imaging optics was also featured in the "LED OPTICS" column by John Wallace, editor-in-chief of Laser Focus World, an authoritative magazine in the international photoelectric field. The report pointed out: "The engineers of the Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences and Xi'an Jiaotong University used a simple and fast method to design two non-imaging LED collimating lenses. This new design method is completely different from the existing LED optics The complex iterative software design method commonly used in design. The collimating lens is very effective. It can focus 80% of the light emitted by the LED into a 5 meter radius cylinder and pass out of the road surface 200 meters away from the light source. . "

Recently, researchers have designed a new Fresnel microlens array device through theoretical research on geometric optics and non-imaging optics. This type of lens element has small size, light weight, high light efficiency, and can achieve a variety of illumination Light spot and other advantages. Related achievements Design of optical element combining Fresnellens with microlens array for uniform light-emitting diode lighting was published in Journal of the Optical Society of America A, Volume 29, September 9, and became one of the most downloaded papers of the month.

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