Research of TIR LED collimation system based on freeform

Hui-fu Zhao

doi:10.1117/12.2268167

8 March 2017 Research of TIR LED collimation system based on freeform

Hui-fu Zhao

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102550T (2017) https://doi.org/10.1117/12.2268167
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

In order to collect a wide angle range light to receive the collimating beam of a small divergence angle, a highly efficient, compact, TIR collimating system has been designed and optimized. The collimating system adopts a hybrid structure with TIR style. First, calculate the initial structure of the collimating system according to Snell’s law and equal focal length principle. Then optimize the initial structure using Lighttools optical design software. Finally, the best LED collimating system has been successfully designed. According to the results of the design, the semi-diameter of the TIR collimating system is 20mm, the diameter is 25mm. The collimating angle is 1.5°. With the light absorption loss of the material and reflection loss of the interface have already been fully considered，the light energy utilization rate is as high as 89.5%. The initial structure of TIR-type LED collimator is designed by Snell’s law and equal focal length principle, and then it is optimized by the Lighttools optical design software, so that light energy utilization ratio and uniformity of illumination in the target surface are improved. In addition, TIR-type collimating system, which is small and easy to use, not only has a high light energy utilization ratio but also a compact structure.

Citation Download Citation

Hui-fu Zhao "Research of TIR LED collimation system based on freeform", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102550T (8 March 2017); https://doi.org/10.1117/12.2268167

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KEYWORDS

Light emitting diodes

Collimation

Reflection

Refraction

Light

Light sources

Optical design software

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