Aberration-free aspherical in-plane tunable liquid lenses by regulating local curvatures

Chen, Qingming; Tong, Xiliang; Zhu, Yujiao; Tsoi, Chi Chung; Jia, Yanwei; Li, Zhaohui; Zhang, Xuming

doi:10.1039/c9lc01217f

Cited by 25 publications

(10 citation statements)

References 47 publications

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“…The previous spherical optofluidic lenses based on the regulation of global curvature are unable to remedy the aberration. To solve this problem, an in-plane lens with the ability to control the local curvature is proposed [ 53 ]. As shown in Figure 16 a, the lens geometry is divided into digital slides for local curvature regulation.…”

Section: Dielectrophoresis-actuated Lenses and Applicationsmentioning

confidence: 99%

Electrically Tunable Lenses for Imaging and Light Manipulation

et al. 2023

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Optofluidics seamlessly combines optics and microfluidics together to construct novel devices for microsystems, providing flexible reconfigurability and high compatibility. By taking advantage of mature electronic fabrication techniques and flexible regulation of microfluidics, electrically actuated optofluidics has achieved fantastic optical functions. Generally, the optical function is achieved by electrically modulating the interfaces or movements of microdroplets inside a small chamber. The high refractive index difference (~0.5) at the interfaces between liquid/air or liquid/liquid makes unprecedented optical tunability a reality. They are suitable for optical imaging devices, such as microscope and portable electronic. This paper will review the working principle and recent development of electrical optofluidic devices by electrowetting and dielectrophoresis, including optical lens/microscope, beam steering and in-plane light manipulation. Some methods to improve the lens performance are reviewed. In addition, the applications of electrical microfluidics are also discussed. In order to stimulate the development of electrically controlled liquid lens, two novel designs derived from electrowetting and dielectrophoresis are introduced in this paper.

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Section: Dielectrophoresis-actuated Lenses and Applicationsmentioning

confidence: 99%

Electrically Tunable Lenses for Imaging and Light Manipulation

et al. 2023

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“…Currently, a series of good studies about optofluidic imaging systems combined artificial intelligence (AI) for smart disease diagnosing are gradually emerging, 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 which implies a potential possibility of combining optical imaging and AI technologies for convenient and accurate smart blood coagulation function diagnoses. Blood clotting is a continuous process that includes clotting activation, formation, and densification, and the patients differ in the rate and intensity of each process.…”

Section: Introductionmentioning

confidence: 99%

Space-time-regulated imaging analyzer for smart coagulation diagnosis

Liu

et al. 2022

Cell Reports Medicine

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“…21,22 In general, the focal length is adjusted by controlling the size, 23 refractive index profile, 24,25 or fluidic interface of the liquid lenses. 26,27 Droplets, 28−31 and display intrinsic lensing behavior. When interfacial stabilization is present, droplets can assemble into twodimension arrays or three-dimensional structures.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Optofluidics, taking advantage of microfluidics and micro-optics to control dynamic fluid materials and manipulate light on a chip, represents a novel and ideal platform to form versatile, responsive, adjustable optical components on a microscale. − Among them, liquid microlenses with tunable focal lengths, as individual components or arranged in arrays, have attracted intensive attention. , In general, the focal length is adjusted by controlling the size, refractive index profile, , or fluidic interface of the liquid lenses. , Droplets, − generated by the two immiscible liquid materials, form the curved interface between fluid volumes and display intrinsic lensing behavior. When interfacial stabilization is present, droplets can assemble into two-dimension arrays or three-dimensional structures. − Recent developments in optofluidics have led to the large-scale production of monodispersed liquid droplets with a range of functionalities, such as droplet-based compound microlenses composed of hydrocarbon and fluorocarbon liquids .…”

Section: Introductionmentioning

confidence: 99%

Tunable and Dynamic Optofluidic Microlens Arrays Based on Droplets

Shi

et al. 2022

Anal. Chem.

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Microlens arrays (MLAs) are acquiring a key role in the micro-optical system, which have been widely applied in the fields of imaging processing, light extraction, biochemical sensing, and display technology. Compared with solid MLAs, liquid MLAs have received extensive attention due to their natural smooth interface and adjustability. However, manufacturing tunable liquid MLAs with ideal structures is still a key challenge for current technologies. In this paper, a novel and simple optofluidic method is demonstrated, enabling the tunable focusing and high-quality imaging of liquid MLAs. Tunable droplets are fabricated and self-assembled into arrays as the MLAs, which can be easily adjusted to focus, form images, and display different focal lengths. Tuning of MLAs’ focusing properties (range from 550 to 5370 μm) is demonstrated by changing the refractive index (RI) of the droplets with a fixed size of 200 μm, which can be changed by adjusting the flow rates of the two branch streams. Also, the corresponding numerical apertures of the MLAs range from 0.026 to 0.26. Furthermore, the MLAs’ functionality for microparticle imaging applications is also illustrated. Combining the MLAs with a 4× objective, microparticle imaging is magnified two times, and the resolution has also been improved on the original basis. Besides, both the size and RI of the MLAs in an optofluidic chip can be further adjusted to detect samples at different positions. These MLAs have the merits of high optical performance, a simple fabrication procedure, easy integration, and good tunability. Thus, it shows promising opportunities for many applications, such as adaptive imaging and sensing.

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Aberration-free aspherical in-plane tunable liquid lenses by regulating local curvatures

Abstract: A reconfigurable in-plane optofluidic lens that enables significant suppression or even elimination of longitudinal spherical aberration using discrete electrode strips.

Cited by 25 publications

References 47 publications

Electrically Tunable Lenses for Imaging and Light Manipulation

Electrically Tunable Lenses for Imaging and Light Manipulation

Space-time-regulated imaging analyzer for smart coagulation diagnosis

Tunable and Dynamic Optofluidic Microlens Arrays Based on Droplets

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