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    Computational Model and Design of the Soft Tunable Lens Actuated by Dielectric Elastomer

    Source: Journal of Applied Mechanics:;2020:;volume( 087 ):;issue: 007
    Author:
    Li, Jinrong
    ,
    Lv, Xiongfei
    ,
    Liu, Liwu
    ,
    Liu, Yanju
    ,
    Leng, Jinsong
    DOI: 10.1115/1.4046896
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Inspired by the accommodation mechanism of the human eye, several soft tunable lenses have been fabricated and demonstrated the capability of controllable focus tuning. This paper presents a computational model of a dielectric elastomer-based soft tunable lens with a compact structure that is composed of a lens frame, two soft films, and the optically transparent fluid enclosed inside. The two soft films, respectively, serve as the active film and passive film. The active film is a dielectric elastomer film and can be coated with the annular electrode or circular electrode. The deformation of the lenses with both electrode configurations can all be formulated by a boundary value problem with different boundary conditions and be solved as the initial value problem using the shooting method. Two common failure modes of loss of tension and electrical breakdown are considered in the calculation of the lens. The computational results can well fit the experimental data. The focus tuning performances as well as the distributions of stretches, stresses, and electric field in the active films of the lenses with two different electrode configurations are compared. The influences of several parameters on the performances of the lenses are discussed, such that the tunable lens can be designed to have maximum focal length change or to be optimized based on different application requirements.
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      Computational Model and Design of the Soft Tunable Lens Actuated by Dielectric Elastomer

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4273317
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    contributor authorLi, Jinrong
    contributor authorLv, Xiongfei
    contributor authorLiu, Liwu
    contributor authorLiu, Yanju
    contributor authorLeng, Jinsong
    date accessioned2022-02-04T14:16:18Z
    date available2022-02-04T14:16:18Z
    date copyright2020/05/04/
    date issued2020
    identifier issn0021-8936
    identifier otherjam_87_7_071005.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4273317
    description abstractInspired by the accommodation mechanism of the human eye, several soft tunable lenses have been fabricated and demonstrated the capability of controllable focus tuning. This paper presents a computational model of a dielectric elastomer-based soft tunable lens with a compact structure that is composed of a lens frame, two soft films, and the optically transparent fluid enclosed inside. The two soft films, respectively, serve as the active film and passive film. The active film is a dielectric elastomer film and can be coated with the annular electrode or circular electrode. The deformation of the lenses with both electrode configurations can all be formulated by a boundary value problem with different boundary conditions and be solved as the initial value problem using the shooting method. Two common failure modes of loss of tension and electrical breakdown are considered in the calculation of the lens. The computational results can well fit the experimental data. The focus tuning performances as well as the distributions of stretches, stresses, and electric field in the active films of the lenses with two different electrode configurations are compared. The influences of several parameters on the performances of the lenses are discussed, such that the tunable lens can be designed to have maximum focal length change or to be optimized based on different application requirements.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleComputational Model and Design of the Soft Tunable Lens Actuated by Dielectric Elastomer
    typeJournal Paper
    journal volume87
    journal issue7
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4046896
    page71005
    treeJournal of Applied Mechanics:;2020:;volume( 087 ):;issue: 007
    contenttypeFulltext
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