基于液晶透镜的电控式光学影像缩放系统

陈明璿; 陈柏儒; 林怡欣

doi:10.3788/YJYXS20153003.0375

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基于液晶透镜的电控式光学影像缩放系统

特邀报告 | 更新时间：2020-08-12

- 基于液晶透镜的电控式光学影像缩放系统
- Electrically tunable optical zoom system based on liquid crystal lenses
- 液晶与显示 2015年30卷第3期页码：375-380
- 作者机构：
  
  台湾交通大学光电工程研究所液晶实验室, 台湾新竹 30010
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20153003.0375
  中图分类号： TN141
- 收稿日期：2014-12-08，
  
  修回日期：2015-01-09，
  
  纸质出版日期：2015-06-05
- 稿件说明：
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陈明璿, 陈柏儒, 林怡欣. 基于液晶透镜的电控式光学影像缩放系统[J]. 液晶与显示, 2015,30(3): 375-380

CHEN Ming-syuan, CHEN Po-ju, LIN Yi-sxin. Electrically tunable optical zoom system based on liquid crystal lenses[J]. , 2015,30(3): 375-380
陈明璿, 陈柏儒, 林怡欣. 基于液晶透镜的电控式光学影像缩放系统[J]. 液晶与显示, 2015,30(3): 375-380 DOI： 10.3788/YJYXS20153003.0375.

CHEN Ming-syuan, CHEN Po-ju, LIN Yi-sxin. Electrically tunable optical zoom system based on liquid crystal lenses[J]. , 2015,30(3): 375-380 DOI： 10.3788/YJYXS20153003.0375.

摘要

为了在便携式设备上实现光学影像缩放

不包含机械式移动的光学系统开发是必要的

因此

我们对可电控改变焦距的液晶透镜所组成的光学系统进行研究

研究内容包含液晶透镜焦距对于放大率、变焦比以及对焦范围的关系.由于单片液晶透镜仅能达到对焦功能

因此我们首先利用两片液晶透镜组成的系统来计算不同物体距离的影像缩放条件.接着

我们利用三片液晶透镜

做到与机械式系统相同

可单独控制清楚物体平面距离以及控制影像大小的系统.实验结果表明: 利用三片透镜屈光率从-11.3 m

-1

连续电控调整至24.9 m

-1

的液晶透镜

可实现清楚物体平面距离由10 cm连续调整至100 cm且缩放比为6.5:1的光学缩放系统.我们利用不同调焦范围的液晶透镜

根据设计原理

来达成不同对焦范围与不同缩放比的电控光学缩放系统.

Abstract

In order to realize optical zoom system on the portable devices

the optical system without any mechanical moving part is necessary. Therefore

we established the electrically tunable optical zoom system using liquid crystal(LC) lenses and investigated the relation between the focal length of the LC lens

magnification of images

zoom ratio and the object distance. One LC lens can only have the function of focusing

therefore

first

we utilized two LC lenses to design the optical system and figure out the zoom ratio at different object distance. Second

we used three LC lenses to establish the system that the function of focusing and zooming can be controlled independently and it is similar with the mechanically tunable system. Experimental results indicate that by using three LC lenses with tunable lens power ranging from -11.3 m

-1

to 24.9 m

-1

we can achieve electrically tunable optical zoom system. The object distance of the system can be changed form 10 cm to 100 cm continuously and the zoom ratio is 6.5:1. According to the principles

we can achieve electrically tunable optical zoom system with different range of object distance and different zoom ratio by LC lenses with different tunable lens power range.

关键词

Keywords

references

Ren H, Wu S T. Introduction to Adaptive Lenses [M]. John Wiley & Sons, 2012.[2] Lin H C, Chen M S, Lin Y H.A review of electrically tunable focusing liquid crystal lenses [J]. Transactions on Electrical and Electronic Materials, 2011, 12(6): 234-240.[3] Lin Y H, Chen M S, Lin H C.An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio [J]. Optics Express, 2011, 19(5):4714-4721.[4] Chen M S, Chen P J, Chen M, et al. An electrically tunable optical image system using composite liquid crystal lenses within separable focus and zoom functions [J]. Optics Express, 2014, 22(10):11427-11435.[5] Lin H C, Lin Y H.An electrically tunable focusing pico projector [J]. Japanese Journal of Applied Physics, 2010, 49:102502.[6] Lin Y H, Chen M S.A pico projection system with electrically tunable optical zoom ratio adopting two liquid crystal lenses [J]. Journal of Display Technology, 2012, 8(7):401-404.[7] Lin H C, Collings N, Chen M S, et al. A holographic projection system with an electrically tuning and continuously adjustable optical zoom [J]. Optics Express, 2012, 20(25):27222-27229.[8] Chen M S, Collings N, Lin H C, et al. A holographic projection system with an electrically adjustable optical zoom and a fixed location of zeroth-order diffraction [J]. Journal of Display Technology, 2014 (6):450-455.[9] Chen H S, Lin Y H.An endoscopic system adopting a liquid crystal lens with an electrically tunable depth-of-field [J]. Optics Express, 2013, 21(15):18079-18088.[10] Tremblay E J, Stamenov I, Beer R D, et al. Switchable telescopic contact lens [J]. Optics Express, 2013, 21(13):15980-15986.[11] Peng R, Chen J, Zhuang S. Electrowetting-actuated zoom lens with spherical-interface liquid lens [J]. Journal of the Optical Society of America A, 2008, 25(11):2644-2650.[12] Lee S, Choi M, Jung K D, et al. Zoom lens design liquid using liquid lens for laparoscope [J]. Optics Express,2013, 21(2):1751-1761.[13] Xu S, Ren H, Wu S T. Dielectrophoretically tunable optofluidic devices [J]. Journal of Physics D: Applied Physics, 2013, 46(48):483001.[14] Seidl K, Knobbe J, Gru G H. Design of an all-reflective unobscured optical-power zoom objective [J]. Applied Optics, 2009, 48(21):4097-4107.[15] Tam E C. Smart electro-optical zoom lens [J]. Optics Letter, 1992, 17(5):4097-4107.[16] Ye M, Noguchi M, Wang B, et al. Zoom lens system without moving elements realized using liquid crystal lenses [J]. Electronics Letter, 2009, 45(12):646-648.[17] Lin Y H, Chen H S. Electrically tunable-focusing and polarizer-free liquid crystal lenses for ophthalmic applications [J]. Optics Express, 2013, 21(8):9428-9436.

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