Large aperture liquid crystal lens array using a composited alignment layer

Dou, Hu; Chu, Fan; Guo, Yuqiang; Tian, Li‐Lan; Wang, Qiong‐Hua; Sun, Yubao

doi:10.1364/oe.26.009254

Cited by 40 publications

(11 citation statements)

References 33 publications

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“…This technique has been used extensively to produce LC microlenses; however, the main challenge is the necessary thickness of these elements. An array of LC lenses with diameters of 1.2 mm is demonstrated in [141]. The optical power can be switched from +100 to +50 diopters for voltages ranging from 11 to 14 V RMS , respectively.…”

Section: Patterned Electrodementioning

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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Section: Patterned Electrodementioning

confidence: 99%

Recent Advances in Adaptive Liquid Crystal Lenses

et al. 2019

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“…When the luminous efficiency of OLED is constant, the light-mixing effect will produce negative influence at small viewing angles on account of a large amount of incident light is scattered to large viewing angles. The light control power can be electronically controlled by a liquid crystal lens [31], so the display performance of small and large viewing angles can be transformed for display devices, as the lens-like liquid crystal cell has been applied to LCDs or OLEDs [7].…”

Section: Introductionmentioning

confidence: 99%

A Light-Mixing Liquid Crystal Lens-Like Cell to Decrease Color Shift and Tune Brightness for Displays

et al. 2022

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A tunable light-mixing liquid crystal lens-like cell (LCLC) is proposed to limit color shift and improve the viewing angle performance. The LCLC is attached on a collimated display, which is introduced to avoid the blue shift of OLED or phase difference of LCD. At voltage on-state, the incident light with low color shift is mixed by the LCLC to ensure the low color shift at different viewing angles, the brightness is also diffused to large viewing angles. At voltage off-state, the incident light is invariant after it is transmitted the LCLC. Using LCLC, display can meet more complex requirement owing to the tunable property of brightness distribution.

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“…Specifically, among the three main designs, the plenoptic camera based on the MLA has a very promising development prospect due to its small size, low cost, and light-field acquisition in a single photographic exposure. Recently, liquid-crystal microlens array (LCMLA)-based plenoptic cameras have attracted a lot of research interest [16][17][18][19], which is owed to the advantages of easy integration with other devices, 2D/3D switchability, ease of manufacture [18][19][20][21][22][23], and, most important, excellent tunability due to the redistribution of liquid-crystal (LC) molecules in the applied electric field [24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Such an excellent tunability enables 2D/3D switchable modes and an extended DOF for LCMLA-based plenoptic cameras [17,18,30].…”

Section: Introductionmentioning

confidence: 99%

Depth-of-Field-Extended Plenoptic Camera Based on Tunable Multi-Focus Liquid-Crystal Microlens Array

Chen

Dong

et al. 2020

Sensors

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Plenoptic cameras have received a wide range of research interest because it can record the 4D plenoptic function or radiance including the radiation power and ray direction. One of its important applications is digital refocusing, which can obtain 2D images focused at different depths. To achieve digital refocusing in a wide range, a large depth of field (DOF) is needed, but there are fundamental optical limitations to this. In this paper, we proposed a plenoptic camera with an extended DOF by integrating a main lens, a tunable multi-focus liquid-crystal microlens array (TMF-LCMLA), and a complementary metal oxide semiconductor (CMOS) sensor together. The TMF-LCMLA was fabricated by traditional photolithography and standard microelectronic techniques, and its optical characteristics including interference patterns, focal lengths, and point spread functions (PSFs) were experimentally analyzed. Experiments demonstrated that the proposed plenoptic camera has a wider range of digital refocusing compared to the plenoptic camera based on a conventional liquid-crystal microlens array (LCMLA) with only one corresponding focal length at a certain voltage, which is equivalent to the extension of DOF. In addition, it also has a 2D/3D switchable function, which is not available with conventional plenoptic cameras.

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Large aperture liquid crystal lens array using a composited alignment layer

Cited by 40 publications

References 33 publications

Recent Advances in Adaptive Liquid Crystal Lenses

Recent Advances in Adaptive Liquid Crystal Lenses

A Light-Mixing Liquid Crystal Lens-Like Cell to Decrease Color Shift and Tune Brightness for Displays

Depth-of-Field-Extended Plenoptic Camera Based on Tunable Multi-Focus Liquid-Crystal Microlens Array

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