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Alvarez varifocal X-ray lens.
Dhamgaye V, Laundy D, Khosroabadi H, Moxham T, Baldock S, Fox O, Sawhney K. Dhamgaye V, et al. Nat Commun. 2023 Jul 31;14(1):4582. doi: 10.1038/s41467-023-40347-1. Nat Commun. 2023. PMID: 37524749 Free PMC article.
Visible light optical elements such as lenses and mirrors have counterparts for X-rays. In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refractors with a cubic thickness profile. ...In add …
Visible light optical elements such as lenses and mirrors have counterparts for X-rays. In the visible regime, a variable focusing po …
Varifocal liquid lens driven by a conical dielectric elastomer actuator.
Cheng Y, Li Z, Chen C, Cao J, Bao C, Ning Y, Hao Q. Cheng Y, et al. Appl Opt. 2022 May 20;61(15):4633-4637. doi: 10.1364/AO.457886. Appl Opt. 2022. PMID: 36256307
A varifocal lens is an important part of optical systems with applications in biomedicine, photography, smartphones, and virtual reality. In this paper, we propose and demonstrate a varifocal liquid lens driven by a conical dielectric elastomer actuato …
A varifocal lens is an important part of optical systems with applications in biomedicine, photography, smartphones, and virtu …
Reconfigurable Terahertz Spatial Deflection Varifocal Metamirror.
Fang J, Zhong R, Xu B, Zhang H, Wu Q, Guo B, Wang J, Wu Z, Hu M, Zhang K, Liu D. Fang J, et al. Micromachines (Basel). 2023 Jun 27;14(7):1313. doi: 10.3390/mi14071313. Micromachines (Basel). 2023. PMID: 37512624 Free PMC article.
A traditional optical lens usually has a fixed focus, and its focus controlling relies on a bulky lens component, which makes integration difficult. In this study, we propose a kind of terahertz spatial varifocal metamirror with a consistent metal-graphene un …
A traditional optical lens usually has a fixed focus, and its focus controlling relies on a bulky lens component, which makes …
A Compact Two-Dimensional Varifocal Scanning Imaging Device Actuated by Artificial Muscle Material.
Cheng Y, Chen C, Liu L, Cao J, Xu Y, Hao Q. Cheng Y, et al. Biomimetics (Basel). 2023 Mar 13;8(1):120. doi: 10.3390/biomimetics8010120. Biomimetics (Basel). 2023. PMID: 36975350 Free PMC article.
The varifocal function is realized by the principle of laterally shifting cubic phase masks and the scanning function is achieved by the principle of the decentered lens. ...Inspired by the artificial muscle, the dielectric elastomer is used as an actuator and produ …
The varifocal function is realized by the principle of laterally shifting cubic phase masks and the scanning function is achieved by …
Varifocal Metalens for Optical Sectioning Fluorescence Microscopy.
Luo Y, Chu CH, Vyas S, Kuo HY, Chia YH, Chen MK, Shi X, Tanaka T, Misawa H, Huang YY, Tsai DP. Luo Y, et al. Nano Lett. 2021 Jun 23;21(12):5133-5142. doi: 10.1021/acs.nanolett.1c01114. Epub 2021 Jun 7. Nano Lett. 2021. PMID: 34097419 Free article.
Fluorescence microscopy with optical sectioning capabilities is extensively utilized in biological research to obtain three-dimensional structural images of volumetric samples. Tunable lenses have been applied in microscopy for axial scanning to acquire multiplane images. …
Fluorescence microscopy with optical sectioning capabilities is extensively utilized in biological research to obtain three-dimensional stru …
Varifocal Metalenses: Harnessing Polarization-Dependent Superposition for Continuous Focal Length Control.
Huang PS, Chu CH, Huang SH, Su HP, Tanaka T, Wu PC. Huang PS, et al. Nano Lett. 2023 Nov 22;23(22):10432-10440. doi: 10.1021/acs.nanolett.3c03056. Epub 2023 Nov 13. Nano Lett. 2023. PMID: 37956251
Traditional varifocal lenses are bulky and mechanically complex. Emerging active metalenses promise compactness and design flexibility but face issues like mechanical tuning reliability and nonlinear focal length tuning due to additional medium requirements. In this …
Traditional varifocal lenses are bulky and mechanically complex. Emerging active metalenses promise compactness and design fle …
Refractive-type varifocal liquid-crystal Fresnel lenses for smart contacts.
Banerjee A, Ghosh C, Karkhanis MU, Deshpande A, Pourshaban E, Majumder A, Kim H, Mastrangelo CH. Banerjee A, et al. Opt Express. 2023 May 8;31(10):17027-17049. doi: 10.1364/OE.489093. Opt Express. 2023. PMID: 37157768 Free article.
We demonstrate the implementation of a low-power, low-profile, varifocal liquid-crystal Fresnel lens stack suitable for tunable imaging in smart contact lenses. ...The lens stack has an aperture of 4 mm and thickness is 980 m. The varifocal l …
We demonstrate the implementation of a low-power, low-profile, varifocal liquid-crystal Fresnel lens stack suitable for tunabl …
Varifocal diffractive lenses for multi-depth microscope imaging.
Reda F, Salvatore M, Borbone F, Maddalena P, Ambrosio A, Oscurato SL. Reda F, et al. Opt Express. 2022 Apr 11;30(8):12695-12711. doi: 10.1364/OE.455520. Opt Express. 2022. PMID: 35472901 Free article.
In addition to the limits imposed by lithographic design-performance compromises, their optical behavior cannot be accurately tuned afterward, making them difficult to integrate in dynamic optical systems. Here we show the realization of fully reconfigurable flat varifocal …
In addition to the limits imposed by lithographic design-performance compromises, their optical behavior cannot be accurately tuned afterwar …
Electrically Tunable Lenses: A Review.
Chen L, Ghilardi M, Busfield JJC, Carpi F. Chen L, et al. Front Robot AI. 2021 Jun 9;8:678046. doi: 10.3389/frobt.2021.678046. eCollection 2021. Front Robot AI. 2021. PMID: 34179110 Free PMC article. Review.
Optical lenses with electrically controllable focal length are of growing interest, in order to reduce the complexity, size, weight, response time and power consumption of conventional focusing/zooming systems, based on glass lenses displaced by motors. ...This pape …
Optical lenses with electrically controllable focal length are of growing interest, in order to reduce the complexity, size, weight, …
Polarization-separating Alvarez metalens.
Hada M, Adegawa H, Aoki K, Ikezawa S, Iwami K. Hada M, et al. Opt Express. 2024 Feb 12;32(4):6672-6683. doi: 10.1364/OE.516853. Opt Express. 2024. PMID: 38439365 Free article.
To integrate the varifocal and polarization separation functions, polarization-dependent phase profiles for an off-axis Alvarez lens were derived and encoded by amorphous silicon pillar meta-atoms with rectangular cross sections to provide independent 0-2pi phase de …
To integrate the varifocal and polarization separation functions, polarization-dependent phase profiles for an off-axis Alvarez le …
117 results