Shen Xin, Wang Yu-Jen, Chen Hung-Shan, Xiao Xiao, Lin Yi-Hsin, Javidi Bahram
Opt Lett. 2015 Feb 15;40(4):538-41. doi: 10.1364/OL.40.000538.
We present a three dimensional (3D) micro integral imaging display system with extended depth of focus by using a polarized bifocal liquid crystal lens. This lens and other optical components are combined as the relay optical element. The focal length of the relay optical element can be controlled to project an elemental image array in multiple positions with various lenslet image planes, by applying different voltages to the liquid crystal lens. The depth of focus of the proposed system can therefore be extended. The feasibility of our proposed system is experimentally demonstrated. In our experiments, the depth of focus of the display system is extended from 3.82 to 109.43 mm.
我们展示了一种通过使用偏振双焦液晶透镜来扩展焦深的三维（3D）微积分成像显示系统。该透镜与其他光学元件组合作为中继光学元件。通过向液晶透镜施加不同电压，可以控制中继光学元件的焦距，从而在具有不同微透镜像平面的多个位置投射元素图像阵列。因此，所提出系统的焦深可以得到扩展。我们通过实验证明了所提系统的可行性。在我们的实验中，显示系统的焦深从3.82毫米扩展到了109.43毫米。
