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학술지 A Thin Film Active-Lens with Translational Control for Dynamically Programmable Optical Zoom
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저자
윤성률, 박선택, 박봉제, 남세광, 박승구, 경기욱
발행일
201508
출처
Applied Physics Letters, v.107 no.8, pp.1-4
ISSN
0003-6951
출판사
American Institute of Physics (AIP)
DOI
https://dx.doi.org/10.1063/1.4929716
협약과제
15ME1300, 형상 재구성이 가능한 능동 마이크로 렌즈 어레이, 경기욱
초록
We demonstrate a thin film active-lens for rapidly and dynamically controllable optical zoom. The active-lens is composed of a convex hemispherical polydimethylsiloxane (PDMS) lens structure working as an aperture and a dielectric elastomer (DE) membrane actuator, which is a combination of a thin DE layer made with PDMS and a compliant electrode pattern using silver-nanowires. The active-lens is capable of dynamically changing focal point of the soft aperture as high as 18.4% through its translational movement in vertical direction responding to electrically induced bulged-up deformation of the DE membrane actuator. Under operation with various sinusoidal voltage signals, the movement responses are fairly consistent with those estimated from numerical simulation. The responses are not only fast, fairly reversible, and highly durable during continuous cyclic operations, but also large enough to impart dynamic focus tunability for optical zoom in microscopic imaging devices with a light-weight and ultra-slim configuration.
KSP 제안 키워드
Dielectric elastomer(DE), Dynamic focus, Electrode pattern, Focal point, Lens structure, Microscopic imaging, Numerical simulations, Translational Movement, Translational control, light-weight, membrane actuator