Blue Phase LC/Polymer Fresnel Lens Fabricated by Holographics

Tan, Jian; Song, Yue; Zhu, Jiliang; Sui, Ni; Wang, Yijun; Sun, Xiaoyang; Lu, Jiangang; Yang, Bo‐Ru; Shieh, Han–Ping D.

doi:10.1109/jdt.2013.2291068

Cited by 21 publications

(14 citation statements)

References 24 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%

“…To increase the dynamic range, Fresnel type BPLC lenses have been developed [28,29]. Figure 16 shows the configuration and working principle of the Fresnel BPLC lens [29].…”

Section: Fresnel Ps-pblc Microlensmentioning

confidence: 99%

“…Recently, another Fresnel BPLC lens fabricated by holography was demonstrated [28]. Figure 17 depicts the schematic of experimental setup for fabricating such a lens.…”

Section: Fresnel Ps-pblc Microlensmentioning

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%

“…To increase the dynamic range, Fresnel type BPLC lenses have been developed [28,29]. Figure 16 shows the configuration and working principle of the Fresnel BPLC lens [29].…”

Section: Fresnel Ps-pblc Microlensmentioning

confidence: 99%

“…Recently, another Fresnel BPLC lens fabricated by holography was demonstrated [28]. Figure 17 depicts the schematic of experimental setup for fabricating such a lens.…”

Section: Fresnel Ps-pblc Microlensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast-Response Liquid Crystal Microlens

Liu

et al. 2014

Micromachines

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“…Either using a chiral nematic LC [97] or blue-phase LC [98,99] has been considered as a route to lens operation that is polarization independent. The pitch of the chiral LC needs to be shorter than the wavelength of light transmitting through the sample.…”

Section: Polarisation Independencementioning

confidence: 99%

Switchable Liquid Crystal Contact Lenses for the Correction of Presbyopia

et al. 2018

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Abstract:Presbyopia is an age-related disorder where the lens of the eye hardens so that focusing on near objects becomes increasingly difficult. This complaint affects everyone over the age of 50. It is becoming progressively more relevant, as the average age of the global population continues to rise. Bifocal or varifocal spectacles are currently the best solution for those that require near and far vision correction. However, many people prefer not to wear spectacles and while multifocal contact lenses are available, they are not widely prescribed and can require significant adaptation by wearers. One possible solution is to use liquid crystal contact lenses that can change focal power by applying a small electric field across the device. However, the design of these contact lenses must be carefully considered as they must be comfortable for the user to wear and able to provide the required change in focal power (usually about +2D). Progress towards different lens designs, which includes lens geometry, liquid crystal choices and suitable alignment modes, are reviewed. Furthermore, we also discuss suitable electrode materials, possible power sources and suggest some methods for switching the lenses between near and far vision correction.

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