Liquid crystal lens with four driving voltages and its applications in imaging system with rectangular aperture

Xu, Lvhan; Zhang, Yalei; Liu, Zhiqiang; Ye, Mao

doi:10.35848/1347-4065/ac468c

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Electrical interconnections can be dramatically simplified using spirals rather than concentric circles in the preparation of the Fresnel lens. To create a 12-step, 5-ring Fresnel lens like that shown in Figure 19: As well as some elaborate electrode designs mentioned above [32][33][34], several authors have formulated various proposals to overcome this issue, such as variable transmission electrodes [98], interdigitated comb electrodes [99], microstructured transmission lines [100], or 4-electrode lenses with rectangular aperture [101]. Nevertheless, the electrode design is complex, and the control of the electric field distribution is limited in most cases.…”

Section: Spirals As Alternative Approachmentioning

confidence: 99%

Optimizing Tunable LC Devices with Twisted Light

Otón,

Pereiro-García,

Quintana

et al. 2023

Crystals

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Tunable circular devices made of liquid crystals or other materials, like lenses, axicons, or phase plates, are often constrained by limitations in size, tunability, power, and other parameters. These constraints restrict their use and limit their applicability. In this review, a thorough study of the use of light’s orbital angular momentum in the manufacturing of liquid crystal (LC) devices is presented. Twisted light fosters the simultaneous optimization of most critical parameters. Experimental demonstrations of the unmatched performance of tunable LC lenses, axicons, and other elements in parameters such as lens diameter (>1″), power and tunability (>±6 diopters), fill factor (>98%), and time response have been achieved by reversible vortex generation created by azimuthal phase delay. This phase delay can eventually be removed within the optical system so that lens performance is not affected.

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Section: Spirals As Alternative Approachmentioning

confidence: 99%

Optimizing Tunable LC Devices with Twisted Light

Otón,

Pereiro-García,

Quintana

et al. 2023

Crystals

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Investigation on liquid medium integration for piezoelectric MEMS tunable liquid lenses

Tang,

Vergara,

Okatani

et al. 2024

Sensors and Actuators A: Physical

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基于Alvarez透镜的紧凑型红外连续变倍系统设计

Ouyang Qi,

Liu Mengyao,

Ning Yan

et al. 2024

激光与光电子学进展

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In this study, a transverse moving infrared optical continuous zoom system based on the Alvarez lens is proposed to address the challenges associated with the complex structure and large volume of traditional axialmoving mechanical optical zoom systems. The system consists of two sets of Alvarez lenses, apertures, focusing lenses, and infrared detectors. Herein, two sets of Alvarez lenses adopt a Keplertype telescope structure, where the first set of Alvarez lenses functions as the zoom group and the second set of Alvarez lenses serves as the compensation group. The infinitely far incident light passes through two sets of Alvarez lenses and exits, the emitted parallel light is then focused and imaged onto the target surface of the infrared detector through a fixed focal lens. Utilizing Zemax software for optical simulation, our designed optical zoom system covers the 8-12 μm long wave infrared band, with a maximum field of view angle of 6°, a maximum pupil diameter of 6 mm, an Fnumber of 2, distortion of <2. 1%, and a total optical length of ~74 mm. The Alvarez lens only requires to be horizontally moved by ~1 mm to achieve continuous optical magnification from 5× to 15× . Moreover, the modulation transfer function of the proposed optical zoom system can attain up to 0. 5@17 lp/mm, assuming a resolution of 320×240 and pixel sizes of 30 μm for the infrared detector. The simulation results indicate that the system has the advantages of high magnification, a compact structure, and high imaging quality, making it a promising candidate for applications in the field of miniaturized infrared zoom imaging.

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Liquid crystal lens with four driving voltages and its applications in imaging system with rectangular aperture

Cited by 3 publications

References 22 publications

Optimizing Tunable LC Devices with Twisted Light

Optimizing Tunable LC Devices with Twisted Light

Investigation on liquid medium integration for piezoelectric MEMS tunable liquid lenses

基于Alvarez透镜的紧凑型红外连续变倍系统设计

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