The vehicle zoom ultra wide angle lens design by using liquid lens technology

Yen, Chih-Ta; Zhang, Jiaming

doi:10.1007/s00542-019-04572-3

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…factor, its purpose is to achieve an anti-focusing effect within a wide range of incident angles to solve the aberration and optical distortion problems of traditional lenses at larger incident angles [28]. Super-wide-angle usually refers to the ability of a camera or optical system to capture a field of view exceeding 90 degrees, so we classify the anti-focus focus system formed when the field of view angle of incident light exceeds 90 degrees as ultra-wide-angle focusing [29]. Figure 6 shows the focusing effect at incident angles of 5°, 15°, 30°, 45°and −5°, −15°, −30°, −45°, indicating that the anti-lens can achieve 90°in the horizontal direction super-wide-angle focus.…”

Section: Super-wide Angle Focusingmentioning

confidence: 99%

Tunable and super-wide angle defocusing lens large phase modulator

Xu,

Zhu,

Qin

2024

Phys. Scr.

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Traditional terahertz wavefront modulators exhibit significant limitations in controlling optical wavefronts. In order to address the adjustability issues of terahertz wavefront modulators, we have developed a novel optical device based on the tunability of Fermi energy levels. Structurally, we find the ability to modulate the Fermi energy levels of graphene by modulating the carrier concentration. We can also change the phase of the light, causing the transmission path of the light as it passes through the graphene array to change, affecting the position of the backfocusing focal point, thus realizing a dynamically adjustable backfocusing effect. Theoretically, employing Dirac notation and Matrix analyze, reveals the corresponding relationship between Fermi level and phase shift. Specifically, one group Fermi levels induces a set of modulated phase changes. Experimental results demonstrate that the proposed modulator offers a large phase modulation range, enabling 2 π phase adjustments. Moreover, it accurately focuses on a predefined focal point located at 400 um, with a numerical aperture of 0.882, a resolution of 30.39, and a full-width at half-maximum of 38. The substantial numerical aperture and small full-width at half-maximum imply that the lens can focus more light while maintaining high resolution, enhanced optical efficiency, and concentrated light focusing. At the same time, by adjusting the position of the Fermi energy level, we have succeeded in realizing a wide-angle focusing effect up to 90°. This capability extends the terahertz wave’s focusing within a wide range, expanding the application scope of traditional focusing devices.

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Section: Super-wide Angle Focusingmentioning

confidence: 99%

Tunable and super-wide angle defocusing lens large phase modulator

Xu,

Zhu,

Qin

2024

Phys. Scr.

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“…The length and width of the prototype are 9.8mm and 10.7mm high. The new zoom function of fisheye optical system can be realized by using the liquid lens technology [49]. In the field of medical and health care, the presence of blood will lead to scattering and absorption in the process of optical imaging.…”

Section: B Fisheye Panoramic Systemmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

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With the rapid development of high-speed communication and artificial intelligence technologies, human perception of real-world scenes is no longer limited to the use of small Field of View (FoV) and low-dimensional scene detection devices. Panoramic imaging emerges as the next generation of innovative intelligent instruments for environmental perception and measurement. However, while satisfying the need for large-FoV photographic imaging, panoramic imaging instruments are expected to have high resolution, no blind area, miniaturization, and multi-dimensional intelligent perception, and can be combined with artificial intelligence methods towards the next generation of intelligent instruments, enabling deeper understanding and more holistic perception of 360 • real-world surrounding environments. Fortunately, recent advances in freeform surfaces, thinplate optics, and metasurfaces provide innovative approaches to address human perception of the environment, offering promising ideas beyond conventional optical imaging. In this review, we begin with introducing the basic principles of panoramic imaging systems, and then describe the architectures, features, and functions of various panoramic imaging systems. Afterwards, we discuss in detail the broad application prospects and great design potential of freeform surfaces, thin-plate optics, and metasurfaces in panoramic imaging. We then provide a detailed analysis on how these techniques can help enhance the performance of panoramic imaging systems. We further offer a detailed analysis of applications of panoramic imaging in scene understanding for autonomous driving and robotics, spanning panoramic semantic image segmentation, panoramic depth estimation, panoramic visual localization, and so on. Finally, we cast a perspective on future potential and research directions for panoramic imaging instruments.

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“…170 • , 160 • , and 150 • with 6%, 30%, and 27% spatial frequency of 180 lp/mm were realized without any moving elements. The total length of the proposed system was 21.9642 mm [123].…”

Section: Electrowetting Effectmentioning

confidence: 99%

Optical zoom imaging systems using adaptive liquid lenses

et al. 2021

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An optical zoom imaging system that can vary the magnification factor without displacing the object and the image plane has been widely used. Nonetheless, conventional optical zoom imaging systems suffer from slow response, complicated configuration, vulnerability to misalignment during zoom operation, and are incompatible with miniaturized applications. This review article focuses on state-of-the-art research on novel optical zoom imaging systems that use adaptive liquid lenses. From the aspect of the configuration, according to the number of adaptive liquid lenses, we broadly divide the current optical zoom imaging systems using adaptive liquid lenses into two configurations: multiple adaptive liquid lenses, and a single adaptive liquid lens. The principles and configurations of these optical zoom imaging systems are introduced and represented. Three different working principles of the adaptive liquid lens (liquid crystal, polymer elastic membrane, and electrowetting effect) adopted in the optical zoom imaging systems are reviewed. Some representative applications of optical zoom imaging systems using adaptive liquid lenses are introduced. The opportunities and challenges of the optical zoom imaging systems using adaptive liquid lenses are also discussed. This review aims to provide a snapshot of the current state of this research field with the aim to attract more attention to put forward the development of the next-generation optical zoom imaging systems.

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The vehicle zoom ultra wide angle lens design by using liquid lens technology

Cited by 7 publications

References 24 publications

Tunable and super-wide angle defocusing lens large phase modulator

Tunable and super-wide angle defocusing lens large phase modulator

Review on Panoramic Imaging and Its Applications in Scene Understanding

Optical zoom imaging systems using adaptive liquid lenses

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