Journal ArticleDOI
Different curvatures of tunable liquid microlens via the control of laminar flow rate
TLDR
In this paper, the tunable liquid microlens using three laminar flows injected into an expansion chamber is described, which can achieve different lens shapes and curvatures through the control of three flow rates.Abstract:
This letter reports the tunable liquid microlens using three laminar flows injected into an expansion chamber. Different lens shapes and curvatures can be achieved and tuned through the control of three flow rates. The expansion chamber is designed to improve the fluidic stability and maintain the ideal lens shape for precise microscale optical measurement. The optical aberration is also eliminated by minimizing the diffusive broadening at the interfaces. The collimation and focusing capabilities of three liquid microlenses are demonstrated. The tunable liquid microlens is promising as a tool to realize different optical components that can be integrated onto a microchip.read more
Citations
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Journal ArticleDOI
Micro-optofluidic Lenses: A review
TL;DR: A systematic perspective on the development of micro-optofluidic lenses and categorizes them according to the concept of tunability, which shows their tunability over solid lens systems without the use of large actuators.
Journal ArticleDOI
Liquid Tunable Microlenses based on MEMS techniques.
TL;DR: The recent rapid development in microlens technology has provided many opportunities for miniaturized optical systems, and has found a wide range of applications, and of special interest are tunable-focus microlenses, which can be tuned using micro-scale actuators integrated with the lens structure.
Journal ArticleDOI
Tunable optofluidic microlens through active pressure control of an air–liquid interface
TL;DR: In this paper, a tunable in-plane optofluidic microlens with a 9× light intensity enhancement at the focal point is presented, which is formed by a combination of a divergent air-liquid interface and a static polydimethylsiloxane lens, and is fabricated using standard soft lithography procedures.
Journal ArticleDOI
A reconfigurable optofluidic Michelson interferometer using tunable droplet grating.
TL;DR: A novel optofluidic Michelson interferometer based on droplet microfluidics used to create a droplet grating that has a real-time tunability in the grating period through varying the flow rates of the liquids and index variation via different combinations of liquids.
Journal ArticleDOI
3D fluidic lens shaping—A multiconvex hydrodynamically adjustable optofluidic microlens
TL;DR: The first microfluidic planar device to form an optofluidic adjustable convex lens with three-dimensional light focusing ability to improve optical sensor systems is presented.
References
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Justin C. Johnson,Heon Jin Choi,Heon Jin Choi,Kelly P. Knutsen,Richard D. Schaller,Peidong Yang,Peidong Yang,Richard J. Saykally +7 more
TL;DR: A redshift that is strongly dependent on pump power supports the idea that the electron–hole plasma mechanism is primarily responsible for the gain at room temperature and is a considerable advance towards the realization of electron-injected, nanowire-based ultraviolet–blue coherent light sources.
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Variable-focus liquid lens for miniature cameras
Stein Kuiper,Bhw Hendriks +1 more
TL;DR: In this paper, it was demonstrated that two immiscible liquids in a tube form a self-centered lens with a high optical quality, and the motion of the lens during a focusing action was studied by observation through the transparent tube wall.
Journal ArticleDOI
Adaptive liquid microlenses activated by stimuli-responsive hydrogels
TL;DR: This work demonstrates a tunable liquid lens system that allows for autonomous focusing and uses pinned liquid–liquid interfaces to obtain stable devices and realize response times of ten to a few tens of seconds.
Journal ArticleDOI
Controlled microfluidic interfaces
Javier Atencia,David J. Beebe +1 more
TL;DR: The microfabrication technologies of the semiconductor industry have made it possible to integrate increasingly complex electronic and mechanical functions, providing us with ever smaller, cheaper and smarter sensors and devices, which has revolutionized ability to precisely control fluid/fluid interfaces for use in fields ranging from materials processing and analytical chemistry to biology and medicine.
Journal ArticleDOI
Experimental and theoretical scaling laws for transverse diffusive broadening in two-phase laminar flows in microchannels
Rustem F. Ismagilov,Abraham D. Stroock,Paul J. A. Kenis,George M. Whitesides,Howard A. Stone +4 more
TL;DR: In this article, the authors quantified both experimentally and theoretically the diffusion of low-molecular-weight species across the interface between two aqueous solutions in pressure-driven laminar flow in microchannels at high Peclet numbers, showing that the width of reaction-diffusion zone at the interface adjacent to the wall of the channel and transverse to the direction of flow scales as the one-third power of both the axial distance down the channel (from the point where the two streams join) and the average velocity of the flow, instead