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Proceedings Paper

Liquid-crystal microlens array with swing and adjusting focus and constructed by dual patterned ITO-electrodes
Author(s): Wanwan Dai; Xingwang Xie; Dapeng Li; Xinjie Han; Zhonglun Liu; Dong Wei; Zhaowei Xin; Xinyu Zhang; Haiwei Wang; Changsheng Xie
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Paper Abstract

Under the condition of existing intense turbulence, the object's wavefront may be severely distorted. So, the wavefront sensors based on the traditional microlens array (MLA) with a fixed focal length can not be used to measure the wavefront effectively. In order to obtain a larger measurement range and higher measurement accuracy, we propose a liquid-crystal microlens array (LCMLA) with needed ability of swing focus over the focal plane and further adjusting focal length, which is constructed by a dual patterned ITO electrodes. The main structure of the LCMLA is divided into two layers, which are made of glass substrate with ITO transparent electrodes. The top layer of each liquid-crystal microlens consists of four rectangular electrodes, and the bottom layer is a circular electrode. In common optical measurements performed, the operations are carried out such as adding the same signal voltage over four electrodes of each microlens to adjust the focal length of the lens cell and adding a signal voltage with different RMS amplitude to adjust the focus position on the focal plane. Experiments show that the LCMLA developed by us demonstrate a desired focal length adjustable function and dynamic swing ability, so as to indicate that the method can be used not only to measure wavefront but also correct the wavefront with strong distortion.

Paper Details

Date Published: 19 February 2018
PDF: 7 pages
Proc. SPIE 10607, MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis, 106070A (19 February 2018); doi: 10.1117/12.2286441
Show Author Affiliations
Wanwan Dai, Huazhong Univ. of Science and Technology (China)
Xingwang Xie, Huazhong Univ. of Science and Technology (China)
Dapeng Li, Shanghai Aerospace Control Technology Institute (China)
Xinjie Han, Huazhong Univ. of Science and Technology (China)
Zhonglun Liu, Huazhong Univ. of Science and Technology (China)
Dong Wei, Huazhong Univ. of Science and Technology (China)
Zhaowei Xin, Huazhong Univ. of Science and Technology (China)
Xinyu Zhang, Huazhong Univ. of Science and Technology (China)
Haiwei Wang, Huazhong Univ. of Science and Technology (China)
Changsheng Xie, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10607:
MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis
Xinyu Zhang; Jun Zhang; Hongshi Sang, Editor(s)

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