Smart Compound Eyes Enable Tunable Imaging
Smart Compound Eyes Enable Tunable Imaging
复制标题
智能复眼实现可调谐成像
DOI：
10.1002/adfm.201903340
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发表时间：
2019-07-08
影响因子：
19
通讯作者：
Sun, Hong-Bo
中科院分区：
文献类型：
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作者：
Ma, Zhuo-Chen;Hu, Xin-Yu;Sun, Hong-Bo
复眼是一种天然的多孔径光学成像系统，在现代光学领域具有很大的发展潜力。然而，自然复眼和人工复眼都是由固定焦距的小眼组成，因此无法进行变焦成像。在本研究中，受人眼可调晶状体的启发，利用飞秒激光直接写入技术，制备了基于牛血清蛋白（BSA）的智能刺激响应复眼。由于BSA在不同pH条件下的膨胀和收缩效应，实现了可调视场（35°-80°）和可变的小眼焦距。除了整个基于蛋白质的复眼的直接原型设计外，还展示了将智能蛋白质小眼与传统光学透镜（本研究中的SU - 8透镜）灵活集成以形成复合复眼的能力。复合复眼在固定视场下实现近400%的焦距调整。预计飞秒激光制造和基于智能蛋白质复眼的集成可能成为制造微型可调谐成像系统的推动者。
Compound eyes are natural multiaperture optical imaging systems and have substantial potential in the field of modern optics. However, both natural and artificial compound eyes are composed of ommatidia with fixed focal lengths, and thus incapable of variable‐focus imaging. In this study, inspired by the tunable crystalline lens of human eyes, smart stimuli‐responsive compound eyes based on the bovine serum album (BSA) protein are fabricated via femtosecond laser direct writing. Due to the swelling and shrinking effect of BSA under different pH conditions, a tunable field of view (FOV, 35°–80°) and variable focal length of ommatidia are achieved. In addition to the direct prototyping of an entire protein‐based compound eye, the ability to flexibly integrate the smart protein ommatidia with a conventional optical lens (an SU‐8 lens in this study) to form a composite compound eye is shown. The composite compound eye achieves nearly 400% of focal length tuning at a fixed FOV. It is anticipated that femtosecond laser fabrication and the integration of smart protein‐based compound eyes may emerge as an enabler for fabricating miniature tunable imaging systems.