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针对全息波导显示系统中输入光栅、转折光栅和输出光栅的光栅参量不一致,导致系统设计和光栅制作难度增大的问题.对比正常配置和锥形配置下的光栅方程,可得全息波导显示系统中全息光栅具有相同周期需要满足转向光栅60°锥形配置.由此提出波导侧面装有反射镜的三光栅单波导板显示构型,其中三个光栅周期完全相同,输入光栅和转向光栅条纹走向一致.使用光学设计软件CODE V对该构型进行仿真,验证了该构型的可行性.与传统全息波导显示构型相比,侧面反射镜的光路折叠作用使得该构型系统无效显示面积和耦合效率损失减小;三个光栅周期相同且输入光栅和转向光栅条纹走向一致,可以降低系统设计和全息光栅制作难度.该构型可以用于虚拟现实显示或者头戴式显示.
In view of the inconsistency of the grating parameters of the input grating, the transition grating and the output grating in the holographic waveguide display system, the system design and the difficulty of grating production increase. The grating configuration in the normal configuration and the conical configuration can be compared in the holographic waveguide display system Holographic grating with the same period needs to meet the steering grating 60 ° conical configuration.Thus proposed waveguide side mounted mirror three grating single waveguide display configuration, in which the three grating period is exactly the same, the input grating and the steering grating stripe coincide The optical design software CODE V was used to simulate this configuration to verify the feasibility of this configuration.Compared with the traditional holographic waveguide display configuration, the optical path folding effect of the side mirror makes the configuration system ineffective display area and coupling Efficiency loss is reduced, the same three grating periods and the same alignment of the input grating and the steering grating stripe can reduce the difficulty of system design and holographic grating fabrication, which can be used in a virtual reality display or a head-mounted display.