Electrically high-resistance liquid crystal micro-lens arrays with high performances for integral imaging 3D display

Zhang, Yongai; Weng, Xuyang; Liu, Penghui; Wu, Chaoxing; Sun, Lei; Yan, Qun; Zhou, Xiongtu; Guo, Tailiang

doi:10.1016/j.optcom.2020.125299

Cited by 22 publications

(11 citation statements)

References 41 publications

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“…When the audience watches, they can get a 3D experience by wearing the corresponding twocolor glasses, but the disadvantage of this scheme is the lack of spectrum. For example, red blue two-color glasses will lose a lot of information in the green frequency band [2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

Complementary multi-band bandpass filters for 3D projection display system

Ma¹,

Bo²,

Liu³

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Section: Introductionmentioning

confidence: 99%

Complementary multi-band bandpass filters for 3D projection display system

Ma¹,

Bo²,

Liu³

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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“…[1][2][3][4][5] Thus, like the basic II technique, the quality of 3D visualization of the target object is determined by the MLA specification, such as its numerical aperture (NA), focal length, and pitch. [6][7][8] Commonly available II system has a fixed image plane position due to the focal length being invariable, which may lead to dizziness and visual fatigue with long-time use. 9,10 Generally, a depth priority II display system can provide a reconstructed image with large depth of field (DOF), whereas the image in a resolution priority II display system with low DOF over a large spatial resolution is reconstructed.…”

Section: Introductionmentioning

confidence: 99%

Enhanced depth of field of integral imaging display using bifocal microlens array fabricated by two‐step lithography

Wang

Zhang

et al. 2023

J Soc Info Display

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Due to the limitation of traditional microlens arrays (MLAs) in integral imaging display, the depth of field (DOF) is restricted in space and the center depth plane is difficult to extend in a large range. Here, we propose a microfabrication method based on bifocal MLAs to improve DOF. The bifocal MLAs for extended DOF were fabricated by using two‐step photolithography and thermal reflow. This method allows diverse microlenses of high to low numerical aperture to achieve high spatial resolution as well as accurate depth estimation. Microlenses of different focal lengths were simultaneously deposited on a substrate by repeated photolithography with multiple photomasks with alignment mark to define micro‐posts of different thicknesses. Hexagonally packaged bifocal MLAs clearly show the DOF extended from 0.004 to 4.908 mm for 57.6 μm in lens diameter, and their corresponding object distance ranges from 0.125 to 0.165 mm. Based on the proposed scheme, this method provides potential applications in integral imaging 3D display or light field display.

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“…The molecular orientation of LC can be controlled with applied electric/magnetic/optical fields leading to the tunable electrical, electro-optical and optical properties [5], allowing for LC to be used in many devices, such as LC displays and LC lenses. The LC lens was first proposed by Sato in 1979 [6] and has been attracting much attention in recent decades [7][8][9][10][11][12][13][14][15][16][17][18]. The focal length of the LC lens is electrically tunable compared with conventional solid lenses.…”

Section: Introductionmentioning

confidence: 99%

Design of Tunable Liquid Crystal Lenses with a Parabolic Phase Profile

et al. 2022

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An electrode pattern design generating a parabolic voltage distribution, in combination with usage of the linear response range of the liquid crystal (LC) material, has been recently proposed to obtain nearly ideal phase profiles for LC lenses. This technique features low driving voltages, simple structure, compact design, and the absence of high-resistivity (HR) layers. In this work, the universal design principle is discussed in detail, which is applicable not only to LC lens design, but also to other LC devices with any phase profile. Several electrode patterns are presented to form a parabolic voltage distribution. An equivalent electric circuit of the LC lens based on the design principle is developed, and the simulation results are given. In the experiments, an LC lens using the feasible parameters is prepared, and its high-quality performance is demonstrated.

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Electrically high-resistance liquid crystal micro-lens arrays with high performances for integral imaging 3D display

Cited by 22 publications

References 41 publications

Complementary multi-band bandpass filters for 3D projection display system

Complementary multi-band bandpass filters for 3D projection display system

Enhanced depth of field of integral imaging display using bifocal microlens array fabricated by two‐step lithography

Design of Tunable Liquid Crystal Lenses with a Parabolic Phase Profile

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