10 January 2018 Design of LED projector based on gradient-index lens
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In this study, a new type of projector light path is designed to eliminate the deficits of existing projection systems, such as complex structure and low collection efficiency. Using a three-color LED array as the lighting source, by means of the special optical properties of a gradient-index lens, the complex structure of the traditional projector is simplified. Traditional components, such as the color wheel, relay lens, and mirror, become unnecessary. In this way, traditional problems, such as low utilization of light energy and loss of light energy, are solved. With the help of Zemax software, the projection lens is optimized. The optimized projection lens, LED, gradient-index lens, and digital micromirror device are imported into Tracepro. The ray tracing results show that both the utilization of light energy and the uniformity are improved significantly.
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Liyong Qian, Liyong Qian, Xiangbing Zhu, Xiangbing Zhu, Haitian Cui, Haitian Cui, Yuanhang Wang, Yuanhang Wang, "Design of LED projector based on gradient-index lens", Proc. SPIE 10616, 2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 106161G (10 January 2018); doi: 10.1117/12.2295555; https://doi.org/10.1117/12.2295555

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