1. Ultrahigh focal sensitivity in a relaxor ferroelectric crystal-based piezoelectric adaptive lens.
- Author
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Qiao, Liao, Gao, Xiangyu, Jin, Haonan, Xin, Benjian, Liu, Jinfeng, Zheng, Huaibin, Dong, Shuxiang, Xu, Zhuo, and Li, Fei
- Subjects
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FERROELECTRIC crystals , *FERROELECTRIC ceramics , *PIEZOELECTRIC thin films , *SINGLE crystals , *PYROELECTRICITY , *PIEZOELECTRICITY , *PIEZOELECTRIC ceramics , *CERAMICS - Abstract
Traditional piezoelectric adaptive lenses (ALENS) are fabricated by piezoceramics with transparent liquids as the filling media. However, it is challenging to achieve high focal sensitivity and long-time robustness because of the low piezoelectricity of ceramics as well as the evaporation and leakage of the liquids. To overcome the above-mentioned issues, we design a piezoelectric lens based on a radial extension-arching mode by using polydimethylsiloxane films and Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIMNT) relaxor ferroelectric single crystals to replace the transparent liquids and Pb(Zr, Ti)O3 (PZT) ceramics, respectively. Due to the ultrahigh piezoelectric properties (d33 ∼ 1500 pC N−1 and d31 ∼ 730 pC N−1) of the PIMNT crystals and the optimized radial extension-arching structure, an ultrahigh focal sensitivity (8.5 cm V−1 and a fast response time (∼102μs) is achieved, outperforming conventional ALENS based on piezoceramic actuators (∼103 μs and ∼10−1 cm V−1) and dielectric elastomer actuators (∼105 μs and ∼10−2 cm V−1). The largest output displacement of our designed ALENS is up to 53.6 μm at 4.2 kHz under 80 Vpp, and its focus is in the range of 57.44 cm to ∞. Furthermore, its performance remains unchanged after 4 × 107 vibration cycles, indicating its long-time robustness. This work sheds light on the design of advanced adaptive optical systems, where an ultrahigh focal sensitivity and a fast response are required. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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