Results 251 to 260 of about 92,796 (294)
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Ophthalmic and Physiological Optics, 1990
Liquid crystal lenses are possibly the spectacle lenses of the future for presbyopic corrections. They present a variable refractive index which can be used to produce the necessary addition needed for presbyopia. The variability of the refractive index is due to the fact that these materials are optically anisotropic.
C W, Fowler, E S, Pateras
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Liquid crystal lenses are possibly the spectacle lenses of the future for presbyopic corrections. They present a variable refractive index which can be used to produce the necessary addition needed for presbyopia. The variability of the refractive index is due to the fact that these materials are optically anisotropic.
C W, Fowler, E S, Pateras
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A Liquid Lens with Liquid-Membrane-Liquid Structure
Frontiers in Optics 2012/Laser Science XXVIII, 2012A liquid lens with liquid-membrane-liquid structure is proposed. Based on elastic mechanics analysis and simulation result of elastic deformation, it demonstrates the feasibility to design large diameter liquid lens without losing symmetric meniscus shape.
Lihui Wang +2 more
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Liquid crystal lens with tunable conical lens properties
Japanese Journal of Applied Physics, 2021Abstract A three-dimensional numerical calculation for analyzing reorientation in liquid crystal (LC) directors and optical phase retardation in an LC lens, which exhibits a tunable conical lens property, is developed. The proposed LC lens design employs a circular electrode, ring electrodes, and a circularly hole-patterned electrode ...
Marenori Kawamura +2 more
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Science, 2004
APPLIED OPTICS Mechanical imaging systems focus images by using tiny motors and drivers to position the lens physically. The miniaturization of mechanical systems requires precision engineering and is limited by the tolerances of the machining tools.
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APPLIED OPTICS Mechanical imaging systems focus images by using tiny motors and drivers to position the lens physically. The miniaturization of mechanical systems requires precision engineering and is limited by the tolerances of the machining tools.
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Evaporation of a Volatile Liquid Lens on the Surface of an Immiscible Liquid
Langmuir, 2016The evaporation behavior of toluene and hexane lenses on the surface of deionized (DI) water is studied. The toluene and hexane lenses during evaporation experience an advancing stage and a receding stage. There exists a significant difference of the evaporation behavior between the toluene lenses and the hexane lenses.
Wei, Sun, Fuqian, Yang
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Liquid acoustic lens for photoacoustic tomography
Optics Letters, 2013Recently, intensive research has been conducted to accelerate the development of photoacoustic (PA) imaging modality for biomedical applications. The use of acoustic lenses to collect ultrasound signals is of great interest. This Letter presents the design and fabrication of a liquid acoustic diverging lens, which can enlarge the acceptance angle of an
Chaolong, Song, Lei, Xi, Huabei, Jiang
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Annular folded electrowetting liquid lens
Optics Letters, 2015We report an annular folded electrowetting liquid lens. The front surface of the lens is coated with a circular reflection film, while the back surface of the lens is coated with a ring-shaped reflection film. This approach allows the lens to get optical power from the liquid-liquid interface three times so that the optical power is tripled.
Lei, Li +4 more
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Deformation of a prestressed liquid lens membrane
Applied Optics, 2017This paper presents a complete model for analysis of the deformed shape of a prestressed circular axisymmetric membrane of a liquid lens. The governing equations are derived using the exact relation between displacements and the Green-Lagrange strains combined with the Saint Venant-Kirchhoff material law, which postulates a linear relation between the ...
Petr Pokorný +7 more
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Intraocular lens based on double-liquid variable-focus lens
Applied Optics, 2014In this work, the crystalline lens in the Gullstrand-Le Grand human eye model is replaced by a double-liquid variable-focus lens, the structure data of which are based on theoretical analysis and experimental results. When the pseudoaphakic eye is built in Zemax, aspherical surfaces are introduced to the double-liquid variable-focus lens to reduce the ...
Runling, Peng +4 more
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Liquid Lens: Advances in Adaptive Optics
Asia Communications and Photonics Conference and Exhibition, 2009‘Liquid lens’ technologies promise significant advancements in machine vision and optical communications systems. Adaptations for machine vision, human vision correction, and optical communications are used to exemplify the versatile nature of this technology.
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