Design of a foveated imaging system based on liquid crystal microlens array

Xingwang Xie; Xinjie Han; Wanwan Dai; Zhaowei Xin; Dong Wei; Mingce Chen; Xinyu Zhang; Haiwei Wang; Changsheng Xie

doi:10.1117/12.2506392

15 November 2018 Design of a foveated imaging system based on liquid crystal microlens array

Xingwang Xie, Xinjie Han, Wanwan Dai, Zhaowei Xin, Dong Wei, Mingce Chen, Xinyu Zhang, Haiwei Wang, Changsheng Xie

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109645M (2018) https://doi.org/10.1117/12.2506392
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

We propose a foveated imaging system (FIS) implementing by effectively correcting wavefront aberration, which mimics the human visual system to obtain a high resolution image for the regions of interest (ROI) while keeping a wide field of view (FOV). It is flexibly tuning the variation of the refractive index of liquid-crystal (LC) materials through adding variable AC voltage signals. A novel liquid-crystal microlens array (LCMLA) with three concentric ringelectrodes are presented, where three different AC voltage signals can be applied to corresponding ring-electrodes. There are three hexagon arrangement patterned electrode arrays with different diameters (equivalent to 98μm, 112μm and 140μm from the center to the periphery) in the concentric circles. The diameter of the MLA in the central field is the smallest, where the spatial resolution may be the highest. If appropriate AC voltage signals are added, the wavefront aberration of the incident light of ROI could be well adjusted. An experiment is developed to validate the performance of the FIS using LCMLA. The example images show that the proposed FIS can obtain local high resolution image of the ROI by dynamically controlling AC voltage signals and a total low resolution image over a wide FOV.

Citation Download Citation

Xingwang Xie, Xinjie Han, Wanwan Dai, Zhaowei Xin, Dong Wei, Mingce Chen, Xinyu Zhang, Haiwei Wang, and Changsheng Xie "Design of a foveated imaging system based on liquid crystal microlens array", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109645M (15 November 2018); https://doi.org/10.1117/12.2506392

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