Liquid-crystal microlens array with swing and adjusting focus and constructed by dual patterned ITO-electrodes

Wanwan Dai; Xingwang Xie; Dapeng Li; Xinjie Han; Zhonglun Liu; Dong Wei; Zhaowei Xin; Xinyu Zhang; Haiwei Wang; Changsheng Xie

doi:10.1117/12.2286441

19 February 2018 Liquid-crystal microlens array with swing and adjusting focus and constructed by dual patterned ITO-electrodes

Wanwan Dai, Xingwang Xie, Dapeng Li, Xinjie Han, Zhonglun Liu, Dong Wei, Zhaowei Xin, Xinyu Zhang, Haiwei Wang, Changsheng Xie

Author Affiliations +

Proceedings Volume 10607, MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis; 106070A (2018) https://doi.org/10.1117/12.2286441
Event: Tenth International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2017), 2017, Xiangyang, China

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.

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Wanwan Dai, Xingwang Xie, Dapeng Li, Xinjie Han, Zhonglun Liu, Dong Wei, Zhaowei Xin, Xinyu Zhang, Haiwei Wang, and Changsheng Xie "Liquid-crystal microlens array with swing and adjusting focus and constructed by dual patterned ITO-electrodes", Proc. SPIE 10607, MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis, 106070A (19 February 2018); https://doi.org/10.1117/12.2286441

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KEYWORDS

Electrodes

Wavefronts

Liquid crystals

Microlens array

Microlens

Aerospace engineering

CCD image sensors

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