상세정보
학술지
A Robust Soft Lens for Tunable Camera Application Using Dielectric Elastomer Actuators
- 발행일
- 201812
- 출처
- SOFT ROBOTICS, v.5 no.6, pp.777-782
- ISSN
- 2169-5172
- 출판사
- Mary Ann Liebert
- 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.
- 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