A tunable liquid-crystal microlens with hybrid alignment

Cheng, Chih-Cheng; Chang, Chun-Che; Liu, Chang Hua; Yeh, J. Andrew

doi:10.1088/1464-4258/8/7/s12

Cited by 28 publications

(12 citation statements)

References 18 publications

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“…(1) and solve the Laplace equation [Eq. (2)] that determines the voltage distribution in the LC system. The equilibrium LC director distribution could be obtained by adopting a vector method [21,22].…”

Section: Numerical Optimization and Experimental Methodsmentioning

confidence: 99%

“…With the development of high power laser systems, adaptive optical systems, and even integral imaging systems, electrotunable liquid crystal microlens arrays have attracted wide research interest for decades because of their potential application in the dynamic wavefront sensing field [1,2]. Liquid crystal microlens arrays possess the advantages of low operating voltage and a tunable focal length.…”

Section: Introductionmentioning

confidence: 99%

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Tunable liquid crystal microlens array using hole patterned electrode structure with ultrathin glass slab

et al. 2012

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A configuration of hole patterned electrode liquid crystal microlens array with an ultrathin glass slab was fabricated. To reduce the fringing electric field effect and avoid the occurrence of disclination lines, an ultrathin glass slab was introduced between the patterned electrode and liquid crystal layer. The glass slab thickness played an important role in effecting the optical performance of the liquid crystal microlens array. An optimum thickness of 30 μm was selected employing numerical simulation method. Using this method, we demonstrated a microlens array that greatly improved the phase profile and focus power. The dynamic focal range of the liquid crystal microlens array may extend from <1.2 mm to >8 mm and the minimum diameter of the focus spot could be as small as 15 µm.

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Section: Numerical Optimization and Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable liquid crystal microlens array using hole patterned electrode structure with ultrathin glass slab

et al. 2012

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“…Electrotunable liquid crystal microlens array (LC MLA) have attracted wide research interest for decades because of their potential application in future adaptive optics system, high power laser system, and 3D-display field [1,2]. Liquid crystal microlens array possesses many advantages, for example, low operating voltage and a tunable focal length.…”

Section: Introductionmentioning

confidence: 99%

Modeling and design of an optimized patterned electrode liquid crystal microlens array with dielectric slab

Zhao

Liu

Zhang

et al. 2013

Optik

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“…The dielectric force attracts interests in eliminating the problems mentioned above. 14,15 Lens droplets made of liquid crystals suffer from birefringement, resulting in utilization of liquids with lower molecule weights. To facilitate the operation of the liquid lens at any positions, the gravitational effect taken into account is proposed to be minimized two liquids of isodensity.…”

Section: Introductionmentioning

confidence: 99%

Miniaturization of dielectric liquid microlens in package

2010

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This study presents packaged microscale liquid lenses actuated with liquid droplets of 300-700 m in diameter using the dielectric force manipulation. The liquid microlens demonstrated function focal length tunability in a plastic package. The focal length of the liquid lens with a lens droplet of 500 m in diameter is shortened from 4.4 to 2.2 mm when voltages applied change from 0 to 79 V rms . Dynamic responses that are analyzed using 2000 frames/s high speed motion cameras show that the advancing and receding times are measured to be 90 and 60 ms, respectively. The size effect of dielectric liquid microlens is characterized for a lens droplet of 300-700 m in diameter in an aspect of focal length.

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A tunable liquid-crystal microlens with hybrid alignment

Cited by 28 publications

References 18 publications

Tunable liquid crystal microlens array using hole patterned electrode structure with ultrathin glass slab

Tunable liquid crystal microlens array using hole patterned electrode structure with ultrathin glass slab

Modeling and design of an optimized patterned electrode liquid crystal microlens array with dielectric slab

Miniaturization of dielectric liquid microlens in package

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