Adaptive Liquid Lens Actuated by Droplet Movement

Liu, Chao; Wang, Qiong‐Hua; Luo, Yao; Wang, Minghuan

doi:10.3390/mi5030496

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…The actuator based on electrostatic force was studied by electrically driving a conducting liquid droplet in direct contact with the non‐conducting liquid lens capable of response in ∼75 ms . The movement of the droplet induced a pressure change and realized curvature shift of the liquid lens.…”

Section: Adaptive Liquid Lens By Different Methodsmentioning

confidence: 99%

Actuation of adaptive liquid microlens droplet in microfluidic devices: A review

Zhu

Yao

et al. 2018

Electrophoresis

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A significant growth of research on adaptive liquid lens is achieved over the past decades, and the field is still attracting increasing attentions, focusing on the transition from the current stage to the commercialized stage. The challenges faced are not limited to fabrication, material, small tuning range in focal lengths, additional control systems, limitations in special actuation methods and so on. In addition, the use of external driving parts or systems induce extra problem on bulky appearance, high cost, low reliability etc. Therefore, adaptive liquid lens will be an interesting research focus in both microfluidics and optofluidics science. This review attempts to summarize and focus on the droplet profile deformation under different driving mechanisms in tunable liquid microlens as well as the application in cameras, cell phone and so on. The driving techniques are generally categorized in terms of mechanisms and driving sources.

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Section: Adaptive Liquid Lens By Different Methodsmentioning

confidence: 99%

Actuation of adaptive liquid microlens droplet in microfluidic devices: A review

Zhu

Yao

et al. 2018

Electrophoresis

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“…The variable-focus liquid lens has many advantages, including a simple structure, low energy consumption, etc. [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator

et al. 2016

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In this paper, we design, fabricate and characterize a new electromagnetically actuated variable-focus liquid lens which consists of two polymethyl methacrylate (PMMA) substrates, a SU-8 substrate, a polydimethylsiloxane (PDMS) membrane, a permanent magnet and a planar electromagnetic actuator. The performance of this liquid lens is tested from four aspects including surface profiling, optical observation, variation of focal length and dynamic response speed. The results shows that with increasing current, the optical chamber PDMS membrane bulges up into a shape with a smaller radius of curvature, and the picture recorded by a charge-coupled device (CCD) camera through the liquid lens also gradually becomes blurred. As the current changes from −1 to 1.2 A, the whole measured focal length of the proposed liquid lens ranges from −133 to −390 mm and from 389 to 61 mm. Then a 0.8 A square-wave current is applied to the electrode, and the actuation time and relaxation time are 340 and 460 ms, respectively. The liquid lens proposed in the paper is easily integrated with microfluidic chips and medical detecting instruments due to its planar structure.

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“…Many approaches have been demonstrated. Electrowetting 14,15 and dielectrophoretic effect [16][17][18][19][20] are the two promising approaches due to actuating the device by voltage directly. Among them, electrowetting is an innovative method for the optical wavelength conversion field because of its unique combination of attractive merits that compare to the reflection type device, for example, liquid crystal on silicon or microelectromechanical systems: fast video speed response, low power consumption, and compatibility to liquid-crystal display manufacturing.…”

Section: Introductionmentioning

confidence: 99%

RGB converter based on liquid prism

et al. 2015

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In this paper, we propose a Red Green Blue (RGB) converter, which is an expanded application of electrowetting liquid prism in the micro‐systems. Four rectangular indium tin oxide (ITO) glass substrates having the same size are stacked to form the sidewalls. Another ITO electrode is fabricated and stuck on the bottom polymethyl methacrylate substrate as the opposite electrode. With two immiscible fluids in the transparent cell, the shape of the liquid–liquid interface can be deformed by electrostatic force. Three different color filters are placed under the prism. When we apply different voltages, the light beam will propagate through different filters by deforming the liquid–liquid interface. Our results show that we can obtain the light having three different colors from a non‐transparent cap's light hole. The device is capable of reasonable switch time (~75 and ~140 ms). It has a wide potential application in tunable lasers, adaptive indicators, and display systems.

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Adaptive Liquid Lens Actuated by Droplet Movement

Cited by 9 publications

References 25 publications

Actuation of adaptive liquid microlens droplet in microfluidic devices: A review

Actuation of adaptive liquid microlens droplet in microfluidic devices: A review

Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator

RGB converter based on liquid prism

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