An electrically tunable plenoptic camera using a liquid crystal microlens array
An electrically tunable plenoptic camera using a liquid crystal microlens array
复制标题
使用液晶微透镜阵列的电可调全光相机
DOI：
10.1063/1.4921194
复制
发表时间：
2015-05-01
影响因子：
1.6
通讯作者：
Xie, Changsheng
中科院分区：
文献类型：
--
作者：
Lei, Yu;Tong, Qing;Xie, Changsheng
全光照相机通常采用定位在主透镜和图像传感器之间的微透镜阵列来捕获可见范围内的三维目标辐射。普通的折射或衍射微透镜由于焦距固定，景深有限，从而限制了其成像能力。在本文中，我们提出了一种新的全光相机使用液晶微透镜阵列（LCMLA）与电可调焦距。利用传统光刻技术和标准微电子工艺制作了LCMLA，并对其聚焦性能进行了实验研究。所制造的LCMLA直接与图像传感器集成，以构建用于获取目标的原始辐射的原型基于LCMLA的全光相机。我们的实验表明，基于LCMLA的全光相机的聚焦区域可以有效地通过电调谐所使用的LCMLA，这相当于自由度的扩展。(C)2015 AIP Publishing LLC.
Plenoptic cameras generally employ a microlens array positioned between the main lens and the image sensor to capture the three-dimensional target radiation in the visible range. Because the focal length of common refractive or diffractive microlenses is fixed, the depth of field (DOF) is limited so as to restrict their imaging capability. In this paper, we propose a new plenoptic camera using a liquid crystal microlens array (LCMLA) with electrically tunable focal length. The developed LCMLA is fabricated by traditional photolithography and standard microelectronic techniques, and then, its focusing performance is experimentally presented. The fabricated LCMLA is directly integrated with an image sensor to construct a prototyped LCMLA-based plenoptic camera for acquiring raw radiation of targets. Our experiments demonstrate that the focused region of the LCMLA-based plenoptic camera can be shifted efficiently through electrically tuning the LCMLA used, which is equivalent to the extension of the DOF. (C) 2015 AIP Publishing LLC.