Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan.
Department of Chemistry, Tsinghua University, Beijing, China.
Sci Rep. 2017 Mar 27;7(1):433. doi: 10.1038/s41598-017-00492-2.
Augmented reality (AR), which use computer-aided projected information to augment our sense, has important impact on human life, especially for the elder people. However, there are three major challenges regarding the optical system in the AR system, which are registration, vision correction, and readability under strong ambient light. Here, we solve three challenges simultaneously for the first time using two liquid crystal (LC) lenses and polarizer-free attenuator integrated in optical-see-through AR system. One of the LC lens is used to electrically adjust the position of the projected virtual image which is so-called registration. The other LC lens with larger aperture and polarization independent characteristic is in charge of vision correction, such as myopia and presbyopia. The linearity of lens powers of two LC lenses is also discussed. The readability of virtual images under strong ambient light is solved by electrically switchable transmittance of the LC attenuator originating from light scattering and light absorption. The concept demonstrated in this paper could be further extended to other electro-optical devices as long as the devices exhibit the capability of phase modulations and amplitude modulations.
增强现实（AR）利用计算机辅助投影信息来增强我们的感官，对人类生活有重要影响，特别是对老年人。然而，AR 系统中的光学系统存在三个主要挑战，即注册、视觉矫正和强环境光下的可读性。在这里，我们首次使用集成在光学透视 AR 系统中的两个液晶（LC）透镜和无偏振衰减器同时解决了这三个挑战。其中一个 LC 透镜用于电调整投影虚拟图像的位置，即所谓的注册。另一个具有较大孔径和偏振无关特性的 LC 透镜负责进行视觉矫正，例如近视和远视。还讨论了两个 LC 透镜的透镜功率的线性度。通过 LC 衰减器的电可切换透光率解决了强环境光下虚拟图像的可读性问题，该 LC 衰减器源于光散射和光吸收。只要设备具有相位调制和幅度调制的能力，本文中演示的概念就可以进一步扩展到其他电光设备。
