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• W2468633910 abstract "We demonstrate a tunable imaging system based on the functionality of the mammalian eye using soft-matter micro-optical components. Inspired by the structure of the eye, as well as by the means through which nature tunes its optical behavior, we show that the technologies of microsystems engineering and micro-optics may be used to realize a technical imaging system whose biomimetic functionality is entirely distinct from that of conventional optics. The engineered eyeball integrates a deformable elastomeric refractive structure whose shape is mechanically controlled through application of strain using liquid crystal elastomer (LCE) actuators; two forms of tunable iris, one based on optofluidics and the other on LCEs with embedded heaters; a fixed lens arrangement; and a commercial imaging sensor chip. The complete microsystem, optimized to yield optical characteristics close to those of the human eye, represents the first fully functional, soft-matter-based tunable single-aperture eye-like imager. Using soft materials, researchers in Germany have fabricated an engineered eyeball that mimics those of mammals. While artificial eyes have been produced before, they generally have poor functionality or are based on the compound eyes of insects. Taking their cue from the structure and tuning mechanism of mammalian eyes, Hans Zappe and co-workers at the University of Freiburg have devised a complete microsystem whose optical characteristics resemble those of the human eye. The eye focuses by using liquid-crystal elastomer actuators to deform an elastic refractive material. Commercial sensor chips act as the detector (the ‘retina’). The scientists produced two different variable apertures (‘irises’), one based on electrowetting and the other on thermal expansion and contraction. The team is confident that the eyeball can be miniaturized and integrated with other microsystem technologies." @default.
• W2468633910 created "2016-07-22" @default.
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• W2468633910 date "2016-01-07" @default.
• W2468633910 modified "2023-10-15" @default.
• W2468633910 title "The engineered eyeball, a tunable imaging system using soft-matter micro-optics" @default.
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• W2468633910 doi "https://doi.org/10.1038/lsa.2016.68" @default.
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