基于改进模型的新型对角微偏振阵列设计

As the core optical device of the division-of-focal-plane (DoFP) polarization imaging system, the micropolarizer array (MPA) exerts an important influence on the reconstruction of the polarization information from scene targets. In this paper, to correct for the resolution loss and instantaneous field of view (IFOV) error of the traditional 2×2 MPA, as well as the limitation that the existing model can only design 2×N series MPA, a design model was proposed based on Fourier frequency domain, which can cover 2×N series and N×N diagonal series MPAs. In addition, three new types of diagonal MPAs were suggested and optimized. Through theoretical analysis, field experiments and numerical simulations, the reconstruction performance of the existing MPAs and the newly designed MPAs was qualitatively analyzed and quantitatively tested. The simulation results show that the 2×2×2 MPA provides the highest reconstruction quality for S₀, S₁, and S₂, and the degree of linear polarization (DoLP) in terms of quantitative measures and visual quality, while the new 3×3 MPA achieves the best reconstruction results for the single detector snapshot imaging system. The application of the improved model and the proposal of new MPAs in this paper provide a theoretical basis for the development of diverse and high-performance MPAs, and promote the practical application of the DoFP polarization imaging system.