Beam shaping for multicolour light-emitting diodes with diffractive optical elements |
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| Authors: | Chao Yu Yifan Peng Tianyi Guo Qiang Fu Xu Liu |
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| Affiliation: | 1. State Key Lab. of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.;2. Department of Computer Science, The University of British Columbia, Vancouver, Canada.;3. Visual Computing Center, KAUST, Thuwal, Kingdom of Saudi Arabia.;4. Visual Computing Center, KAUST, Thuwal, Kingdom of Saudi Arabia. |
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| Abstract: | ![]()
An improved particle swarm optimization method is proposed for the design of ultra-thin diffractive optical elements (DOEs) enabling multicolour beam shaping functionality. We employ pre-optimized initial structures and adaptive weight strategy in the algorithm to achieve better and identical shaping performance for multiple colours. Accordingly, a DOE for shaping light from green and blue LEDs has been designed and fabricated. Both experiment and numerical simulations have been conducted and the results agree well with each other. 15.66% average root mean square error (RMSE) and 0.22% RMSE difference are achieved. In addition, the parameters closely related to the performance of the optimization are analysed, which can provide insights for future application designs. |
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| Keywords: | Beam shaping multicolour adaptive weight optimized DOE |
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