Polarization-independent adaptive lens with two different blue-phase liquid-crystal layers

Liu, Yifan; Li, Yan; Wu, Shin‐Tson

doi:10.1364/ao.52.003216

Cited by 8 publications

(6 citation statements)

References 29 publications

(33 reference statements)

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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%

“…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: Introductionmentioning

confidence: 99%

Fast-Response Liquid Crystal Microlens

Liu

et al. 2014

Micromachines

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“…In order to cope with different application environments, some multi-functional LC such as switchable LC lens between positive and negative [16][17][18], rotatable LC lenses [19][20][21][22], LC lenses with switchable optical aperture [18,24], polarizer-free and fast response LC lens used blue liquid crystal (BPLC) [25][26][27][28][29][30][31] have been proposed. Among them, a rotatable LC lens is particularly promising because it can achieve the image switchable function for landscape and portrait, which is very important for handheld electronic equipments such as tablet computers or mobile phones.…”

Section: Introductionmentioning

confidence: 99%

P‐12.9: A Switchable Liquid Crystal Microlens Between 1D and 2D Arrays

Wang

Zhong

Dou

2022

Symp Digest of Tech Papers

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A liquid crystal (LC) lens array with a half‐wave plate (HWP) to enable the function of switchable lens array between 1 dimensional (1D) and 2 dimensional (2D) arrays is proposed in this paper. The LC cell contains two LC layers which can be driven independently. Through controlling these two LC layers, three different modes of the LC cell such as a lensless system, rotatable 1D lens array and 2D lens array can be switched freely. These three different modes are used for coexistence of 2D and 3D displays, a narrow 3D display viewing angle for a single viewer in an energy‐saving method and a wide 3D display viewing angle for more viewer. Therefore, we propose a multi‐functional LC lens array in order to meet different application conditions.

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“…So far, researchers all over the world have proposed many methods to overcome those drawbacks mentioned and thus greatly increase the beam utilization efficiency. Depending on fabrication approaches, polarization-insensitive LCMLAs can be divided into two categories: the devices based on LC materials such as blue phase liquid crystal (BPLC) or polymer dispersed liquid crystal (PDLC) [8][9][10][11][12][13][14], and the others based on the prealignment of common LC molecules [15][16][17][18][19][20]. By changing LC materials, researchers have effectively constructed LCMLAs with polarizationinsensitive property.…”

Section: Introductionmentioning

confidence: 99%

An electrically tunable polarization and polarization-independent liquid-crystal microlens array for imaging applications

Xin

Tong

Lei

et al. 2017

J. Opt.

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In this study, a polarization-independent microlens array composed of two layered nematic liquid crystal (LC) materials with orthogonal alignment and separated by a double-sided indium-tin oxide silica with a thickness of ∼500 μm, is proposed. The functioned stacking of two polarization LC microstructures lead to an electrically tuning polarization and also polarization-independent light control architecture. Experimental investigations reveal key characters such as a high beam utilization efficiency of more than 90% and a compound point spread function tuned electrically. Dual-mode imaging including the polarization mode and the polarization-independent mode can be realized based on the novel configuration with both independent voltage signals applied over two functioned LC layers. The normalized focusing intensity demonstrates a special property of no polarization dependence on beams processed. An image criteria for evaluating the quality of polarization-insensitive images based on the difference image between the horizontal and vertical polarization images, is introduced. Considering the advantages of electrically tunable composed focal length and then switching the polarization and polarization-independent mode, it can be expected that the developed devices can not only be used to measure and further tune the polarization state of beams propagating in LC layers but also acquire high quality target images.

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Polarization-independent adaptive lens with two different blue-phase liquid-crystal layers

Cited by 8 publications

References 29 publications

Fast-Response Liquid Crystal Microlens

Fast-Response Liquid Crystal Microlens

P‐12.9: A Switchable Liquid Crystal Microlens Between 1D and 2D Arrays

An electrically tunable polarization and polarization-independent liquid-crystal microlens array for imaging applications

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