We improved the three-dimensional (3D) crosstalk level of multi-view 3D displays using a lens array with small f-number, thereby facilitating a wide 3D viewing window. In particular, we designed a polarization-dependent-switching liquid crystal (LC)-based gradient refractive index (GRIN) lens array that could be switched between 2D and 3D viewing modes. For the GRIN lens with a small f-number (1.08), we studied the effect of the interfacial curvature between the plano-concave isotropic polymer layer and the plano-convex birefringent LC layer on the aberration properties. We examined the conventional spherical, quadratic polynomial aspherical, and a high-order (fourth-order) polynomial aspherical curvature. For the high-order polynomial aspherical curvature, the achievable transverse spherical aberration (TSA = 10.2 µm) was considerably lower than that with the spherical (TSA = 100.3 µm) and quadratic polynomial aspherical (TSA = 30.4 µm) curvatures. Consequently, the angular luminance distributions for each view were sharper for the high-order polynomial interfacial curvature. We designed multi-view (43-view) 3D displays using the arrays of switchable LC lenses with different curvatures, and the average adjacent crosstalk levels within the entire viewing window (50°) were 68.5%, 73.3%, and 60.0% for the spherical, quadratic polynomial aspherical, and high-order polynomial aspherical curvatures, respectively.

中文翻译：

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具有宽视角窗口的多视角2D / 3D切换显示器的可切换镜头设计

我们使用具有较小f值的透镜阵列改善了多视图3D显示器的三维（3D）串扰水平，从而简化了3D观察窗口。特别是，我们设计了一种基于偏振相关切换液晶（LC）的梯度折射率（GRIN）透镜阵列，该透镜阵列可以在2D和3D观看模式之间切换。对于GRIN镜头，小f值（1.08），我们研究了平凹各向同性聚合物层和平凸双折射LC层之间的界面曲率对像差性能的影响。我们研究了常规的球面，二次多项式非球面曲率和高阶（四阶）多项式非球面曲率。对于高阶多项式非球面曲率，可实现的横向球面像差（TSA = 10.2 µm）显着低于球面（TSA = 100.3 µm）和二次多项式非球面（TSA = 30.4 µm）曲率。因此，对于高阶多项式界面曲率，每个视图的角亮度分布都更锐利。我们使用具有不同曲率的可切换LC透镜阵列设计了多视图（43视图）3D显示器，