Crosstalk elimination in multi-view autostereoscopic display based on polarized lenticular lens array

An autostereoscopic display composed of a directional backlight, an image display panel, a striped half-wave plate,and a polarized lenticular lens array is proposed. The directional backlight emitting the parallel light can redirect the cones of light to lenticular lens array and reduce the chromatic spatial-interference effect. The striped half-wave plate, located in front of the image display panel, transformed the polarization direction of the lights from the directional backlight into two mutually perpendicular directions. The polarized lenticular lens array not only can divide the light from the left and right view images to send to left and right eyes but also can reduce the crosstalk of the stereoscopic images. The proposed autostereoscopic display can produce high quality stereoscopic images without crosstalk at the optimal viewing distance.

柱状透镜阵列对物体隐形现象的探究

柱状透镜阵列可以用来扭曲光线使“物体消失”,即通过柱状透镜阵列观察物体时可实现隐形效果.根据光在空间和介质中的传播特性,结合几何光学和光度学理论,提出了临界隐形物距的概念,可用来衡量柱状透镜阵列的隐形效果.通过光学物理场仿真和实验,探究了柱状透镜阵列属性包括透镜单元间距、曲率半径、折射率以及物体几何形状等因素对该隐形现象的影响.理论与实验相辅相成,有助于学生理解柱状透镜阵列导致物体隐形的产生机制,也可作为大学物理实验教学中的创新设计性实验案例.

集会聚发散功能一体化的液晶柱透镜阵列

本文提出了一种制备集会聚和发散功能一体化的液晶柱透镜阵列的方法。液晶柱透镜阵列呈“三明治”结构,从上到下依次为:上电极基板、液晶层、聚合物柱透镜阵列、下电极基板。为了将会聚和发散功能集成在单一液晶盒中,制备聚合物柱透镜阵列的紫外光敏胶的折射率(n_(p))需介于液晶的寻常光折射率(n_(o))和非寻常光折射率(n_(e))之间。通过在下基板表面修饰图案化疏水层,利用亲疏水效应使得紫外光敏胶自组装形成表面光滑、尺寸均一的柱透镜阵列。所制备的液晶柱透镜阵列有两种调节聚焦和散焦功能的方式:一种是改变入射光的偏振方向;另一种是施加电场调控液晶层的有效折射率。实验结果表明:当外加电压从0调节到0.7 V_(rms)时,液晶柱透镜的焦距从−4 mm调节到∞;当外加电压在1~7 V_(rms)变化时,液晶柱透镜阵列的焦距从6.0 mm调节到4.5 mm。该方法制备的液晶柱透镜阵列具有制备方法简单、器件结构紧凑、驱动电压低、调焦范围大等优点,在成像、显示、光通信等领域具有潜在的应用价值。