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Design of a high-performance in-coupling grating using differential evolution algorithm for waveguide display
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DOI：10.1364/OE.26.026646.png)
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Illuminance nonuniformity caused by natural vignetting can seriously affect the display quality of large-field-of-view (FOV) waveguide displays. In this paper, an optimization method based on the differential evolution algorithm is proposed for in-coupling grating design to improve coupling efficiency and compensate for natural vignetting. The in-coupling grating parameters are optimized to achieve efficiency distributions in which efficiency increases continuously with incidence angle, realizing uniform illuminance over a large FOV of 45 degrees. The angular uniformity reaches 0.89. Additionally, average diffraction efficiency reaches 89.13% for transverse-electric polarization at 532 nm and 76% in the wavelength region between 450 and 700 nm. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keyword:
HEAD-MOUNTED DISPLAY
FREEFORM
HMD
IMPLEMENTATION
OPTIMIZATION
FABRICATION
EFFICIENCY
PHASE
IMAGE
THIN
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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引用论文
Replicated slanted gratings with a high refractive index material for in and outcoupling of light.png)
OPTICS EXPRESSOAAI
OPTICS EXPRESSIF3.3
OAAI分享收藏分享收藏Differential evolution algorithm with ensemble of parameters and mutation strategies具有参数集成和变异策略的差分进化算法
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