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학술지 A Robust Soft Lens for Tunable Camera Application Using Dielectric Elastomer Actuators
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저자
남세광, 윤성률, 윤재웅, 박선택, 박승구, 문성철, 박봉제, 경기욱
발행일
201812
출처
SOFT ROBOTICS, v.5 no.6, pp.777-782
ISSN
2169-5172
출판사
Mary Ann Liebert
DOI
https://dx.doi.org/10.1089/soro.2017.0146
협약과제
18JS1300, 고속응답 능동 마이크로 렌즈 연구, 윤성률
초록
Developing tunable lenses, an expansion-based mechanism for dynamic focus adjustment can provide a larger focal length tuning range than a contraction-based mechanism. Here, we develop an expansion-tunable soft lens module using a disk-type dielectric elastomer actuator (DEA) that creates axially symmetric pulling forces on a soft lens. Adopted from a biological accommodation mechanism in human eyes, a soft lens at the annular center of a disk-type DEA pair is efficiently stretched to change the focal length in a highly reliable manner. A soft lens with a diameter of 3 mm shows a 65.7% change in the focal length (14.3-23.7 mm) under a dynamic driving voltage signal control. We confirm a quadratic relation between lens expansion and focal length that leads to large focal length tunability obtainable in the proposed approach. The fabricated tunable lens module can be used for soft, lightweight, and compact vision components in robots, drones, vehicles, and so on.
키워드
Actuator, Lens, Mimic, Tunable
KSP 제안 키워드
7 mm, Dielectric elastomer(DE), Dielectric elastomer actuator(DEA), Disk-type, Dynamic focus, Focal length, Lens module, Signal Control, Tuning Range, Vision components, camera application