【摘要】 建立了液晶光栅与等效矩形光栅之间的理论模型,且计算了零级衍射效率和槽深h的理论数据。将实验数据与理论模型进行比较,得到了考虑电场边缘效应时的修正系数α和槽深h的修正计算公式,通过修正公式得出了槽深h和占空比修正值Δρ的图形,最后分析了电场边缘效应对液晶光栅衍射特性的影响。当电控液晶光栅ρ=0.5:光线正入射时进行实验测试,发现由于电场边缘效应,液晶光栅偶级衍射出现,并分析了随着电压的变化,边缘效应对液晶光栅衍射效率、相位差、占空比修正值Δρ及槽深h变化的影响。更多还原

【Abstract】 This paper built theoretic model between the liquid crystal and the equivalent regular grating,and calculated theoretic data of the zero order diffractive efficiency and groove depth h.By comparing the experimental data with the theoretic model,the corrected coefficient α and formula of groove depth h were obtained.Through these formulas,the figures of groove depth h and variation of duty cycle Δρ were obtained.The influence of marginal effect of electric field on the properties of the liquid crystal grating was analyzed.When liquid crystal grating ρ equals to 0.5,this paper got the experimental data at right angle of incidence,and found that the even-order diffraction showed up.The influences of the marginal effect of electric field on the diffractive efficiency,phase delay,variation of duty cycle Δρ and groove depth h of the liquid crystal grating were analyzed.更多还原