1. Design of reflective color filters with high angular tolerance by particle swarm optimization method
- Author
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Xu Liu, Liang Hong, Weidong Shen, Yueguang Zhang, Hongyu Zhen, and Chenying Yang
- Subjects
Light ,Guided-mode resonance ,Computer Science::Neural and Evolutionary Computation ,Grating ,Optics ,Primary color ,Coincident ,Electric field ,Scattering, Radiation ,Computer Simulation ,Specular reflection ,Spectroscopy ,Physics ,Color difference ,business.industry ,Particle swarm optimization ,Equipment Design ,Models, Theoretical ,Atomic and Molecular Physics, and Optics ,Equipment Failure Analysis ,Refractometry ,Optoelectronics ,Computer-Aided Design ,Colorimetry ,Color filter array ,business ,Refractive index ,Algorithms ,Filtration - Abstract
We propose three color filters (red, green, blue) based on a two-dimensional (2D) grating, which maintain the same perceived specular colors for a broad range of incident angles with the average polarization. Particle swarm optimization (PSO) method is employed to design these filters for the first time to our knowledge. Two merit functions involving the reflectance curves and color difference in CIEDE2000 formula are respectively constructed to adjust the structural parameters during the optimization procedure. Three primary color filters located at 637nm, 530nm and 446nm with high saturation are obtained with the peak reflectance of 89%, 83%, 66%. The reflectance curves at different incident angles are coincident and the color difference is less than 8 for the incident angle up to 45°. The electric field distribution of the structure is finally studied to analyze the optical property.
- Published
- 2013