We propose a near-eye display optics system that supports three-dimensional mutual occlusion. By exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS), we achieve real see-through scene masking as well as virtual digital scene imaging using a single LCoS. Dynamic depth control of the real scene mask and virtual digital image is also achieved by using a focus tunable lens (FTL) pair of opposite curvatures. The proposed configuration using a single LCoS and opposite curvature FTL pair enables the self-alignment of the mask and image at an arbitrary depth without distorting the see-through view of the real scene. We verified the feasibility of the proposed optics using two optical benchtop setups: one with two off-the-shelf FTLs for continuous depth control, and the other with a single Pancharatnam–Berry phase-type FTL for the improved form factor.

中文翻译：

---

采用硅基单相液晶的光学透视近眼显示器中的变焦遮挡

我们提出了一种支持三维相互遮挡的近眼显示光学系统。通过利用硅基纯相位液晶 (LCoS) 的偏振控制特性，我们使用单个 LCoS 实现了真正的透视场景遮蔽以及虚拟数字场景成像。真实场景掩模和虚拟数字图像的动态深度控制也是通过使用一对相反曲率的焦点可调透镜（FTL）来实现的。所提出的配置使用单个 LCoS 和相反曲率 FTL 对，能够在任意深度处实现掩模和图像的自对准，而不会扭曲真实场景的透视视图。我们使用两种光学台式设置验证了所提出的光学器件的可行性：一种具有两个现成的 FTL，用于连续深度控制，另一种具有单个 Pancharatnam-Berry 相型 FTL，用于改进的外形尺寸。