Two-dimensional varifocal scanning imaging based on Alvarez and decentred lenses actuated by dielectric elastomer

Chen, Chuanxun; Hao, Qun; Cao, Jie; Xu, Yingying; Cheng, Yang

doi:10.1016/j.optlastec.2023.109805

Cited by 4 publications

(1 citation statement)

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“…In the previous study [ 37 ], the DE combined with the Alvarez lens could achieve a wide adjustment range of focal length. The varifocal function is realized by the Alvarez lenses, and the scanning function of this element is realized by the scanning elements.…”

Section: Experiments and Discussionmentioning

confidence: 99%

Continuous Optical Zoom Compound Eye Imaging Using Alvarez Lenses Actuated by Dielectric Elastomers

Chen,

Hao,

Liu

et al. 2024

Biomimetics

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The compound eye is a natural multi-aperture optical imaging system. In this paper, a continuous optical zoom compound eye imaging system based on Alvarez lenses is proposed. The main optical imaging part of the proposed system consists of a curved Alvarez lens array (CALA) and two Alvarez lenses. The movement of the CALA and two Alvarez lenses perpendicular to the optical axis is realized by the actuation of the dielectric elastomers (DEs). By adjusting the focal length of the CALA and the two Alvarez lenses, the proposed system can realize continuous zoom imaging without any mechanical movement vertically to the optical axis. The experimental results show that the paraxial magnification of the target can range from ∼0.30× to ∼0.9×. The overall dimensions of the optical imaging part are 54 mm × 36 mm ×60 mm (L × W × H). The response time is 180 ms. The imaging resolution can reach up to 50 lp/mm during the optical zoom process. The proposed continuous optical zoom compound eye imaging system has potential applications in various fields, including large field of view imaging, medical diagnostics, machine vision, and distance detection.

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Section: Experiments and Discussionmentioning

confidence: 99%