Polarization independent blue-phase liquid crystal cylindrical lens with a resistive film

Li, Yan; Liu, Yifan; Li, Qing; Wu, Shin‐Tson

doi:10.1364/ao.51.002568

Cited by 54 publications

(27 citation statements)

References 32 publications

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“…Polymer-stabilized blue phase liquid crystal (PS-BPLC) microlenses [28][29][30][31][32][33][34] have been developed with several attractive features: (1) submillisecond response time, (2) alignment-free, and (3) polarization insensitive. Blue phase [47][48][49][50] exists over a narrow temperature range (1-2 °C) between chiral nematic and isotropic phases.…”

Section: Operation Principlesmentioning

confidence: 99%

“…However, it requires multiple data addressing for multiple electrodes. To further simplify the lens structure, a PS-BPLC cylindrical lens with a resistive film electrode was proposed [31]. As depicted in Figure 15, on the inner surface of top substrate, there is a center ITO electrode stripe at the center of the lens, and two ITO electrode stripes on the two edges, respectively.…”

Section: Ps-pblc Microlens With Multi-electrodementioning

confidence: 99%

“…Two major technical challenges have severely limited their practical applications and commercialization: polarization dependency and slow response time (several seconds or hundreds of milliseconds). The former can be solved by using residual phase modulations [26,27], and optical isotropic materials, such as blue phase LC [28][29][30][31][32][33][34], double-layered structure [35][36][37], or axially symmetric photoalignment [38]. Due to the intrinsic speed of NLCs, the response time of a LC microlens is usually in the order of 100 ms, which is obviously not fast enough for image processing, optical communication, etc.…”

Section: Introductionmentioning

confidence: 99%

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Fast-Response Liquid Crystal Microlens

Liu

et al. 2014

Micromachines

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Electrically tunable liquid crystal microlenses have attracted strong research attention due to their advantages of tunable focusing, voltage actuation, low power consumption, simple fabrication, compact structure, and good stability. They are expected to be essential optical devices with widespread applications. However, the slow response time of nematic liquid crystal (LC) microlenses has been a significant technical barrier to practical applications and commercialization. LC/polymer composites, consisting of LC and monomer, are an important extension of pure LC systems, which offer more flexibility and much richer functionality than LC alone. Due to the anchoring effect of a polymer network, microlenses, based on LC/polymer composites, have relatively fast response time in comparison with pure nematic LC microlenses. In addition, polymer-stabilized blue phase liquid crystal (PS-BPLC) based on Kerr effect is emerging as a promising candidate for new photonics application. The major attractions of PS-BPLC are submillisecond response time and no need for surface alignment layer. In this paper, we review two types of fast-response microlenses based on LC/polymer composites: polymer dispersed/stabilized nematic LC and polymer-stabilized blue phase LC. Their basic operating principles are introduced and recent progress is reviewed by examples from recent literature. Finally, the major challenges and future perspectives are discussed. OPEN ACCESSMicromachines 2014, 5 301

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Section: Operation Principlesmentioning

confidence: 99%

Section: Ps-pblc Microlens With Multi-electrodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast-Response Liquid Crystal Microlens

Liu

et al. 2014

Micromachines

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“…A smooth variation of the potential difference over the liquid crystal can still be obtained by using floating electrodes [9] or a highly resistive layer connecting the addressing electrodes [10][11][12]. The resistive layer acts as a potential divider and causes a monotonic variation of the electric potential between neighboring electrodes.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric thin films with liquid crystal for gradient index applications

Willekens¹,

George²,

Neyts³

et al. 2016

Opt. Express

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We report on the first ever combination of a thin film of lead zirconate titanate (PZT) with a liquid crystal (LC) layer. Many liquid crystal applications use a transparent conductive oxide to switch the liquid crystal. Our proposed processing does not, instead relying on the extremely high dielectric constant of the ferroelectric layer to extend the electric field from widely spaced electrodes over the liquid crystal. It eliminates almost entirely the fringe field problems that arise in nearly all the liquid crystal devices that use multiple addressing electrodes. We show, both via rigorous simulations as well as experiments, that the addition of a PZT layer over the addressing electrodes leads to a markedly improved LC switching performance at distances of up to 30 µm from the addressing electrodes with the current PZT-layer thickness of 0.84 µm. This improvement in switching is used to tune the focal length of the microlens with electrodes spaced at 30 µm.

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“…The first one is a blue phase liquid crystal (BPLC) adaptive lens array driven by Pedot: PSS resistive film electrodes. 12 It not only has the advantages of other BPLC adaptive lens designs, [13][14][15] such as submillisecond response time and polarization insensitivity, but also exhibits other attractive features, such as relatively low driving voltage and simple driving scheme. The second lens design has a double-layered structure, including one polymeric lens layer and one twisted-nematic (TN) liquid crystal cell serving as polarization rotator.…”

Section: Introductionmentioning

confidence: 99%

Fast-response liquid-crystal lens for 3D displays

Liu

Ren

et al. 2014

SPIE Proceedings

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Three-dimensional (3D) display has become an increasingly important technology trend for information display applications. Dozens of different 3D display solutions have been proposed. The autostereoscopic 3D display based on lenticular microlens array is a promising approach, and fast-switching microlens array enables this system to display both 3D and conventional 2D images. Here we report two different fast-response microlens array designs. The first one is a blue phase liquid crystal lens driven by the Pedot: PSS resistive film electrodes. This BPLC lens exhibits several attractive features, such as polarization insensitivity, fast response time, simple driving scheme, and relatively low driving voltage, as compared to other BPLC lens designs. The second lens design has a double-layered structure. The first layer is a polarization dependent polymer microlens array, and the second layer is a thin twisted-nematic (TN) liquid crystal cell. When the TN cell is switched on/off, the traversing light through the polymeric lens array is either focused or defocused, so that 2D/3D images are displayed correspondingly. This lens design has low driving voltage, fast response time, and simple driving scheme. Simulation and experiment demonstrate that the performance of both switchable lenses meet the requirement of 3D display system design.

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Polarization independent blue-phase liquid crystal cylindrical lens with a resistive film

Cited by 54 publications

References 32 publications

Fast-Response Liquid Crystal Microlens

Fast-Response Liquid Crystal Microlens

Ferroelectric thin films with liquid crystal for gradient index applications

Fast-response liquid-crystal lens for 3D displays

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