Liquid crystal lens with optimized wavefront across the entire clear aperture

Sova, Oleksandr; Galstian, Tigran

doi:10.1016/j.optcom.2018.10.030

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…To address the relatively small value of w GRIN , several approaches have been employed. Firstly, a further "floating" electrode can be added (see Figure 5c) [62][63][64][65][66]. Here, an extra electrode is added to the lens' centre, which acts to redistribute the fringing field further from the hole-patterned electrode.…”

Section: Lensesmentioning

confidence: 99%

Liquid Crystal Devices for Beam Steering Applications

2021

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Liquid crystals are valuable materials for applications in beam steering devices. In this paper, an overview of the use of liquid crystals in the field of adaptive optics specifically for beam steering and lensing devices is presented. The paper introduces the properties of liquid crystals that have made them useful in this field followed by a more detailed discussion of specific liquid crystal devices that act as switchable optical components of refractive and diffractive types. The relative advantages and disadvantages of the different devices and techniques are summarised.

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Section: Lensesmentioning

confidence: 99%

Liquid Crystal Devices for Beam Steering Applications

2021

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“…In 2019, T. Galstian et al theoretically studied the control of LC directors by hole‐shaped electrodes and obtained a relatively consistent result with the experimental results. [ 86 ] However, due to the introduction of approximate conditions, their theory is effective only when the diameter of the LC lens (0.5–5 mm) is much greater than the thickness of the LC layer (about 50 µm). Hence, more efforts should be devoted to developing the theory for GRIN microlens.…”

Section: Fabricationsmentioning

confidence: 99%

Design, Fabrication, and Applications of Liquid Crystal Microlenses

Chen

Hou

Shu-qing

et al. 2021

Advanced Optical Materials

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Microlenses and microlens arrays are one of the indispensable components in modern optical systems ranging from imaging and beam shaping to polarization control and switchable 2D/3D displays. Among them, the liquid crystal microlenses (LCMs) with size below 1 mm have attracted more and more attention due to their stimuli‐responsiveness and tunability in focal length and polarization. Compared with microlenses based on inorganic binary optics, diffractive optical elements, or metasurface, LCMs are more cost‐effective and can be easily tuned. In this paper, an in‐depth review of the design principles, fabrication techniques, emerging applications, and recent advances of LCMs and arrays is presented, aiming to clarify the characteristics, limitations, and challenges in LCMs design and fabrication. This review may provide directions for solving those challenges, and expand the applications of LCMs.

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“…The lens has been tested in an 8-megapixel miniature camera of a cell phone [154]. Finally, different modifications for the modal control technique (based on inner and floating electrodes) are analyzed in [155]. It is claimed that it is possible to obtain a parabolic wavefront across the entire clear aperture of the lens.…”

Section: Modal Controlmentioning

confidence: 99%

Recent Advances in Adaptive Liquid Crystal Lenses

et al. 2019

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An adaptive-focus lens is a device that is capable of tuning its focal length by means of an external stimulus. Numerous techniques for the demonstration of such devices have been reported thus far. Moving beyond traditional solutions, several new approaches have been proposed in recent years based on the use of liquid crystals, which can have a great impact in emerging applications. This work focuses on the recent advances in liquid crystal lenses with diameters larger than 1 mm. Recent demonstrations and their performance characteristics are reviewed, discussing the advantages and disadvantages of the reported technologies and identifying the challenges and future prospects in the active research field of adaptive-focus liquid crystal (LC) lenses.

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Liquid crystal lens with optimized wavefront across the entire clear aperture

Cited by 15 publications

References 21 publications

Liquid Crystal Devices for Beam Steering Applications

Liquid Crystal Devices for Beam Steering Applications

Design, Fabrication, and Applications of Liquid Crystal Microlenses

Recent Advances in Adaptive Liquid Crystal Lenses

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