摘要：In this Letter, an all-optical logic sequence generator based on two different polarization holographic gratings has been proposed and demonstrated, which has one input port and four output ports. The polarization state of input light signal determines logic output signals. It can produce four kinds of logic sequence output signals:1000, 0100, 0010, and 0001, corresponding to the input light signal of four different polarization states: the p-linear, s-linear, left-handed circular, and right-handed circular. The two polarization gratings have been fabricated, and the working principle of the logic sequence generator has been proved by diffraction pattern analysis of polarization gratings.

摘要：A new optical system for an augmented reality(AR) display is proposed in this *** optical system mainly includes a ray deflector, coupling input grating, optical waveguide, and coupling output *** the ray deflector and the coupling input grating are designed based on the diffraction characteristics of the polarization grating, and the coupling output grating is the Bragg reflection *** with other AR schemes, this AR optical system not only reduces the number of projections from two to one, but also improves the efficiency of light coupling into the optical *** energy loss is reduced by utilizing the single-order diffraction characteristics of the polarization grating in its coupling input *** light deflector uses the polarization selectivity of the polarization grating and the characteristics of the rotating light of the twisted nematic liquid crystal layer to realize beam *** working principle of the optical system is experimentally and theoretically demonstrated.

摘要：观赏蔬菜作为新型园林植物材料,给园林景观营造输入了新鲜血液,给游客带来了新的视觉体验。基于此,梳理了观赏蔬菜的概念及类型,并从园林植物造景的角度出发,对观赏蔬菜在园林中的主要造景形式进行深入分析,以保证观赏植物在园林中的应用更加合理,达到科学性与艺术性的统一。