High-speed, compact, adaptive lenses using in-line transparent dielectric elastomer actuator membranes

Shian, Samuel; Diebold, Roger Mitchell; Clarke, David R.

doi:10.1117/12.2009848

Cited by 14 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is reflected in the step response, where we see a clear resonance at the falling step, but not in the rising step. This data indicates that response times around 2 to 3 ms are feasible with appropriate control, which is by a factor of 10 faster than the "high speed" adaptive lens reported recently in [7]. When comparing these numbers to other adaptive lenses, one also has to keep in mind the 12 mm aperture of the system, which is larger than most lenses in the literature.…”

Section: B Dynamic Behaviormentioning

confidence: 65%

A Compact, Large-Aperture Tunable Lens with Adaptive Spherical Correction

Wapler

Stürmer

Wallrabe

2014

2014 International Symposium on Optomechatronic Technologies

View full text Add to dashboard Cite

In this paper, we present the proof of concept a very fast adaptive glass membrane lens with a large aperture/diameter ratio, spherical aberration correction and integrated actuation. The membrane is directly deformed using two piezo actuators that can tune the focal length and the conical parameter. This operating principle allows for a usable aperture of the whole membrane diameter. Together with the efficient actuation mechanism, the aperture is around 2/3 of the total system diameter -at a thickness of less than 2mm. The response time is a few milliseconds at 12mm aperture, which is fast compared to similar systems.

show abstract

Section: B Dynamic Behaviormentioning

confidence: 65%

A Compact, Large-Aperture Tunable Lens with Adaptive Spherical Correction

Wapler

Stürmer

Wallrabe

2014

2014 International Symposium on Optomechatronic Technologies

View full text Add to dashboard Cite

show abstract

“…Dielectric elastomer (DE) materials are new kind of flexible smart materials developed in recent years (Lu et al, 2020). Much efforts on DE materials have been devoted to the following several aspects: (i) design and preparation of new DE materials and devices (Carpi et al, 2007; Dunki et al, 2015; Guo et al, 2021; Kovacs et al, 2009; Miriyev et al, 2017; Sarban et al, 2011; Yin et al, 2017; Yu et al, 2017; Zhao and Meng, 2020), (ii) the large deformation mechanism of DE materials under the electromechanical coupling (Foo et al, 2012; Hong, 2011; Mao et al, 2016; Qu et al, 2012; Tian et al, 2021; Zhao et al, 2011), and (iii) the new flexible structures based on DE materials (Shian et al, 2013; Herbeck et al, 2001; Leipold et al, 2003; Son et al, 2012; Thomson et al, 2019; Zhang et al, 2020b). Comparing with piezoelectric and shape memory materials, all of these researches show that the advantages of dielectric elastomers include large strain, light weight, high response speed, and good compatibility with structures.…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of flexible thin-walled beam using multi-layer planar dielectric elastomer actuator

Xue

Liu

Xie

et al. 2022

Journal of Vibration and Control

View full text Add to dashboard Cite

The paper investigates the active vibration control (AVC) of flexible thin-walled structure using dielectric elastomer (DE) actuator. It is proposed to bond directly DE film to the surface of flexible thin-walled structure so as to actively control structural vibration through in-plane actuation of DE film. This kind of actuator is referred to as planar DE actuator, which has advantages such as small additional mass and easy installation, and thereby can realize more easily active vibration control of flexible thin-walled structures in comparison with DE actuators with columnar configuration. In order to reduce control voltage, a multi-layer planar DE actuator (MPDEA) is further developed. Based on the Hamilton principle and the constitutive equation of DE material, the governing equation in the form of finite element for a cantilever polycarbonate beam with MPDEA is derived. Simulated and experimental studies are carried out on active vibration control of flexible thin-walled beam using MPDEA with different layers. The results show that MPDEA can achieve good vibration control effect for flexible thin-walled beam. Especially, the driving voltage can be greatly reduced by employing MPDEA. Moreover, a nonlinear compensation model is proposed to suppress the control spillover caused by nonlinear actuating properties of MPDEA. The simulated and experimental results of AVC of cantilever flexible thin-walled beam with the compensation model show that the overall control performance can be improved due to noticeable restrain of the control spillover.

show abstract

“…A capillary-force-dominated tunable lens based on higher-order-harmonic resonance has been presented which uses a piezoelectric ring transducer as the lens actuator and adjusts the focus by controlling the driving voltage [8]. The elastomerliquid lens system has a self-contained structure and changes the focus by altering the surface curvature of the transparent dielectric elastomer in the optical path of thelens [9,10]. A liquid tunable lens using an ionexchange polymer composites (IPMC) actuator has been designed; this adjusts the lens focus through the surface alteration caused by the voltage imposed on the IPMC material [11].…”

Section: Introductionmentioning

confidence: 99%

A bio-inspired optical system with a polymer membrane and integrated structure

Wang¹

2016

Bioinspir. Biomim.

View full text Add to dashboard Cite

A bio-inspired optical imaging system with a polymer membrane and integrated structure is proposed. Similar to the human eye, the presented system has a biomimetic multilayered optical structure and utilizes a solid-liquid mixed tunable lens as the variable-focus unit. The focal length of the imaging system can be adjusted flexibly through the deformation of the tunable lens when it is compressed. A detailed description of the design principle, materials and fabrication process of the system is presented. The deformation property, adjustable range and surface roughness of the tunable lens are measured. Images under different displacement loads are captured, and the relationships among the back focal length (BFL) and effective focal length (EFL) of the system and the change in radius of the tunable lens are analyzed. A 7.6 times variation of the BFL is achieved through a tiny alteration in radius of 1.2 mm. All the measured resolutions during the deformation stage are larger than 40 line pairs mm, and the imaging system shows good optical quality and stability. The proposed optical system is of interest for the development of compact and stable imaging systems with a large zooming range.

show abstract

High-speed, compact, adaptive lenses using in-line transparent dielectric elastomer actuator membranes

Cited by 14 publications

References 17 publications

A Compact, Large-Aperture Tunable Lens with Adaptive Spherical Correction

A Compact, Large-Aperture Tunable Lens with Adaptive Spherical Correction

Active vibration control of flexible thin-walled beam using multi-layer planar dielectric elastomer actuator

A bio-inspired optical system with a polymer membrane and integrated structure

Contact Info

Product

Resources

About