Abstract
In this work, we proposed a grating optimization method for waveguide type head-up display based on the multilayer perceptron network classification, which achieves rapid prediction and optimization of an interlayer grating structure. Compared with existing grating structures, the optimized grating has a coupling efficiency of 73% at wavelengths of 450 nm, 532 nm, and 637 nm simultaneously. The uniformity of diffractive efficiency can reach 0.84 within the 400–650 nm range, ultimately achieving color uniformity within a single-layer waveguide over a 15° field of view angle range. This method also provides ideas for optimizing other types of grating waveguide structures.
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Funding
This research was funded by the National Natural Science Foundation of China (62375013).
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Authors and Affiliations
Contributions
YC and DL wrote the main manuscript text. XZ and XC and ML and YZ and HL and SL contributed: data set arrangement, figure editing and paper writing. All authors reviewed the manuscript. YC and DL contributed equally to this work.
