使用液晶微透镜的高分辨率三维重建双模相机

提出了一种基于液晶微透镜阵列的双模成像相机。该相机通过打开或者关闭加载在液晶微透镜阵列上的低频电压信号可以快捷地在传统平面成像模式和光场成像模式之间进行切换。液晶微透镜阵列通过常规紫外光刻和湿法刻蚀技术制作而成。通过将液晶微透镜阵列和感光传感器阵列以及主镜头耦合到一起，构造了一个双模成像相机的原型。通过该双模成像相机开展了相关实验，获取了同一目标物的光场图像和平面图像，并对孔径设计和两种工作模式下的景深进行了分析，给出了光场成像模式下目标物三维信息的计算方法，通过将三维光场数据和对应二维平面数据的信息进行融合获得了高分辨率三维图像。

Dual-mode camera using liquid-crystal microlens for high-resolution three-dimensional reconstruction

A dual-mode camera (DMC) was proposed based on liquid-crystal microlens array (LCMLA), which could be readily switched between the conventional planar imaging mode and the plenoptic imaging mode through turning on/off the low frequency voltage signal applied on the LCMLA. The LCMLA was fabricated by common UV-photolithography and wet etching. Through coupling the LCMLA with a main lens and a photosensitive sensor array, a DMC prototype was constructed. Experiments were conducted to acquire plenoptic imaging data and corresponding planar imaging data of objects. The issues of the aperture design and the depth of field in the two modes were discussed in detail. A computation method for three-dimensional (3D) information acquisition based on the plenoptic imaging mode was given. A high-resolution 3D reconstruction was implemented by fusing 3D plenoptic data and corresponding 2D high-resolution planar imaging data.