Liquid crystal microlens array for dual mode imaging

被引：0
|
作者：
Lei Y. [1 ,2 ]
Tong Q. [1 ]
Zhang X. [1 ]
机构：
[1] National Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science and Technology, Wuhan, 430074, Hubei
[2] School of Information Science and Technology, Shijiazhuang Tiedao University, Shijiazhuang, 050043, Hebei
来源：
Guangxue Xuebao/Acta Optica Sinica | 2016年 / 36卷 / 05期
关键词：
Dual mode imaging; Gradient refractive index lens; Imaging systems; Liquid crystal microlens array; Plenoptic imaging;
D O I：
10.3788/AOS201636.0511004
中图分类号：
学科分类号：
摘要：
A transparent hole patterned liquid crystal microlens array is designed and fabricated via ultraviolet photolithography and wet etching based on nematic liquid crystal materials for its anisotropy and birefringence. An optical testing system is set up to evaluate its focusing performance and focal length, and the relationship between the focal length and the applied voltage is given. The array is coupled with a main lens and an image sensor to constitute a prototype of dual mode imaging camera, which can switch instantly between plenoptic imaging and normal imaging by turning on or off the applied voltage signals. Raw images are acquired in the two modes. It is obvious that the camera can capture three-dimensional plenoptic images in the plenoptic mode, as well as normal images in the normal mode. © 2016, Chinese Lasers Press. All right reserved.
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页数：8
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共 26 条
  • [1] Nie Y., Xiangli B., Zhou Z., Advances in light field photography technique, Journal of Graduate University of Chinese Academy of Sciences, 28, 5, pp. 563-572, (2011)
  • [2] Adelson E.H., Wang J.Y., Single lens stereo with a plenoptic camera, IEEE Transactions on Pattern Analysis and Machine Intelligence, 14, 2, pp. 99-106, (1992)
  • [3] Ng R., Levoy M., Bredif M., Et al., Light field photography with a hand-held plenoptic camera, Stanford Tech Report CSTR, 2, 11, pp. 1-11, (2005)
  • [4] Lumsdaine A., Georgiev T., The focused plenoptic camera, IEEE International Conference on Computational Photography, (2009)
  • [5] Perwass C., Wietzke L., Single lens 3D-camera with extended depth-of-field, 8291, (2012)
  • [6] Li X., Cao F., Sun Y., Preparation of miniature PDLC film optical switch, Laser & Optoelectronics Progress, 51, 2, (2014)
  • [7] Cai D., Ti P., Jia P., Et al., Research of a dynamic Hartmann sensor using liquid crystal spatial light modulator, Chinese J Lasers, 41, (2014)
  • [8] Li K., Wang Z., Zhang R., Et al., Study of birefringence dispersion based on liquid crystal variable retarder, Chinese J Lasers, 42, 1, (2015)
  • [9] Han Y., Chen Z., Yu J., Et al., Side-polished fiber sensing for measurement of nematic liquid crystal orientation, Acta Optica Sinica, 34, 2, (2014)
  • [10] Sato S., Liquid-crystal lens-cells with variable focal length, Japanese Journal of Applied Physics, 18, 9, pp. 1679-1684, (1979)
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